diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ac46ee7e16347..d55c48fd7ad94 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -27583,23 +27583,12 @@ namespace ts {
             }
             const links = getNodeLinks(expr);
             const symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (isReadonlySymbol(symbol)) {
-                    error(expr, Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
-                }
-
-                checkDeleteExpressionMustBeOptional(expr, getTypeOfSymbol(symbol));
+            if (symbol && isReadonlySymbol(symbol)) {
+                error(expr, Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
             }
             return booleanType;
         }
 
-        function checkDeleteExpressionMustBeOptional(expr: AccessExpression, type: Type) {
-            const AnyOrUnknownOrNeverFlags = TypeFlags.AnyOrUnknown | TypeFlags.Never;
-            if (strictNullChecks && !(type.flags & AnyOrUnknownOrNeverFlags) && !(getFalsyFlags(type) & TypeFlags.Undefined)) {
-                error(expr, Diagnostics.The_operand_of_a_delete_operator_must_be_optional);
-            }
-        }
-
         function checkTypeOfExpression(node: TypeOfExpression): Type {
             checkExpression(node.expression);
             return typeofType;
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 4a7c6e8b461f4..ab45cbe0cf43e 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2963,10 +2963,6 @@
         "category": "Error",
         "code": 2789
     },
-    "The operand of a 'delete' operator must be optional.": {
-        "category": "Error",
-        "code": 2790
-    },
 
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
diff --git a/tests/baselines/reference/controlFlowDeleteOperator.errors.txt b/tests/baselines/reference/controlFlowDeleteOperator.errors.txt
index f5a6823a778b0..91ec2aa0de8db 100644
--- a/tests/baselines/reference/controlFlowDeleteOperator.errors.txt
+++ b/tests/baselines/reference/controlFlowDeleteOperator.errors.txt
@@ -1,8 +1,7 @@
-tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts(10,12): error TS2790: The operand of a 'delete' operator must be optional.
 tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts(14,12): error TS2703: The operand of a 'delete' operator must be a property reference.
 
 
-==== tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts (2 errors) ====
+==== tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts (1 errors) ====
     function f() {
         let x: { a?: number | string, b: number | string } = { b: 1 };
         x.a;
@@ -13,8 +12,6 @@ tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts(14,12): error T
         x.b;
         delete x.a;
         delete x.b;
-               ~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
         x.a;
         x.b;
         x;
diff --git a/tests/baselines/reference/deleteChain.errors.txt b/tests/baselines/reference/deleteChain.errors.txt
deleted file mode 100644
index dd71641957338..0000000000000
--- a/tests/baselines/reference/deleteChain.errors.txt
+++ /dev/null
@@ -1,66 +0,0 @@
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(2,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(3,9): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(6,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(7,9): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(10,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(11,9): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(14,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(15,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(16,9): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(19,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(20,9): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(23,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts(24,9): error TS2790: The operand of a 'delete' operator must be optional.
-
-
-==== tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts (13 errors) ====
-    declare const o1: undefined | { b: string };
-    delete o1?.b;
-           ~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o1?.b);
-            ~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    
-    declare const o2: undefined | { b: { c: string } };
-    delete o2?.b.c;
-           ~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o2?.b.c);
-            ~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    
-    declare const o3: { b: undefined | { c: string } };
-    delete o3.b?.c;
-           ~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o3.b?.c);
-            ~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    
-    declare const o4: { b?: { c: { d?: { e: string } } } };
-    delete o4.b?.c.d?.e;
-           ~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o4.b?.c.d)?.e;
-           ~~~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o4.b?.c.d?.e);
-            ~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    
-    declare const o5: { b?(): { c: { d?: { e: string } } } };
-    delete o5.b?.().c.d?.e;
-           ~~~~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o5.b?.().c.d?.e);
-            ~~~~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    
-    declare const o6: { b?: { c: { d?: { e: string } } } };
-    delete o6.b?.['c'].d?.['e'];
-           ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete (o6.b?.['c'].d?.['e']);
-            ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).errors.txt b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).errors.txt
deleted file mode 100644
index 8a876cb63502f..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).errors.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-tests/cases/compiler/deleteExpressionMustBeOptional.ts(34,10): error TS2339: Property 'j' does not exist on type 'Foo'.
-
-
-==== tests/cases/compiler/deleteExpressionMustBeOptional.ts (1 errors) ====
-    interface Foo {
-        a: number
-        b: number | undefined
-        c: number | null
-        d?: number
-        e: number | undefined | null
-        f?: number | undefined | null
-        g: unknown
-        h: any
-        i: never
-    }
-    
-    interface AA {
-        [s: string]: number
-    }
-    
-    type BB = {
-        [P in keyof any]: number
-    }
-    
-    declare const f: Foo
-    declare const a: AA
-    declare const b: BB
-    
-    delete f.a
-    delete f.b
-    delete f.c
-    delete f.d
-    delete f.e
-    delete f.f
-    delete f.g
-    delete f.h
-    delete f.i
-    delete f.j
-             ~
-!!! error TS2339: Property 'j' does not exist on type 'Foo'.
-    
-    delete a.a
-    delete a.b
-    
-    delete b.a
-    delete b.b
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).js b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).js
deleted file mode 100644
index 268c76175bff1..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).js
+++ /dev/null
@@ -1,57 +0,0 @@
-//// [deleteExpressionMustBeOptional.ts]
-interface Foo {
-    a: number
-    b: number | undefined
-    c: number | null
-    d?: number
-    e: number | undefined | null
-    f?: number | undefined | null
-    g: unknown
-    h: any
-    i: never
-}
-
-interface AA {
-    [s: string]: number
-}
-
-type BB = {
-    [P in keyof any]: number
-}
-
-declare const f: Foo
-declare const a: AA
-declare const b: BB
-
-delete f.a
-delete f.b
-delete f.c
-delete f.d
-delete f.e
-delete f.f
-delete f.g
-delete f.h
-delete f.i
-delete f.j
-
-delete a.a
-delete a.b
-
-delete b.a
-delete b.b
-
-//// [deleteExpressionMustBeOptional.js]
-delete f.a;
-delete f.b;
-delete f.c;
-delete f.d;
-delete f.e;
-delete f.f;
-delete f.g;
-delete f.h;
-delete f.i;
-delete f.j;
-delete a.a;
-delete a.b;
-delete b.a;
-delete b.b;
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).symbols b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).symbols
deleted file mode 100644
index aad7423a133ad..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).symbols
+++ /dev/null
@@ -1,118 +0,0 @@
-=== tests/cases/compiler/deleteExpressionMustBeOptional.ts ===
-interface Foo {
->Foo : Symbol(Foo, Decl(deleteExpressionMustBeOptional.ts, 0, 0))
-
-    a: number
->a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
-
-    b: number | undefined
->b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
-
-    c: number | null
->c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
-
-    d?: number
->d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
-
-    e: number | undefined | null
->e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
-
-    f?: number | undefined | null
->f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
-
-    g: unknown
->g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
-
-    h: any
->h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
-
-    i: never
->i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
-}
-
-interface AA {
->AA : Symbol(AA, Decl(deleteExpressionMustBeOptional.ts, 10, 1))
-
-    [s: string]: number
->s : Symbol(s, Decl(deleteExpressionMustBeOptional.ts, 13, 5))
-}
-
-type BB = {
->BB : Symbol(BB, Decl(deleteExpressionMustBeOptional.ts, 14, 1))
-
-    [P in keyof any]: number
->P : Symbol(P, Decl(deleteExpressionMustBeOptional.ts, 17, 5))
-}
-
-declare const f: Foo
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->Foo : Symbol(Foo, Decl(deleteExpressionMustBeOptional.ts, 0, 0))
-
-declare const a: AA
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
->AA : Symbol(AA, Decl(deleteExpressionMustBeOptional.ts, 10, 1))
-
-declare const b: BB
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
->BB : Symbol(BB, Decl(deleteExpressionMustBeOptional.ts, 14, 1))
-
-delete f.a
->f.a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
-
-delete f.b
->f.b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
-
-delete f.c
->f.c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
-
-delete f.d
->f.d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
-
-delete f.e
->f.e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
-
-delete f.f
->f.f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
-
-delete f.g
->f.g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
-
-delete f.h
->f.h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
-
-delete f.i
->f.i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
-
-delete f.j
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
-
-delete a.a
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
-
-delete a.b
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
-
-delete b.a
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
-
-delete b.b
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
-
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).types b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).types
deleted file mode 100644
index 371bb25e96d82..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=false).types
+++ /dev/null
@@ -1,137 +0,0 @@
-=== tests/cases/compiler/deleteExpressionMustBeOptional.ts ===
-interface Foo {
-    a: number
->a : number
-
-    b: number | undefined
->b : number
-
-    c: number | null
->c : number
->null : null
-
-    d?: number
->d : number
-
-    e: number | undefined | null
->e : number
->null : null
-
-    f?: number | undefined | null
->f : number
->null : null
-
-    g: unknown
->g : unknown
-
-    h: any
->h : any
-
-    i: never
->i : never
-}
-
-interface AA {
-    [s: string]: number
->s : string
-}
-
-type BB = {
->BB : BB
-
-    [P in keyof any]: number
-}
-
-declare const f: Foo
->f : Foo
-
-declare const a: AA
->a : AA
-
-declare const b: BB
->b : BB
-
-delete f.a
->delete f.a : boolean
->f.a : number
->f : Foo
->a : number
-
-delete f.b
->delete f.b : boolean
->f.b : number
->f : Foo
->b : number
-
-delete f.c
->delete f.c : boolean
->f.c : number
->f : Foo
->c : number
-
-delete f.d
->delete f.d : boolean
->f.d : number
->f : Foo
->d : number
-
-delete f.e
->delete f.e : boolean
->f.e : number
->f : Foo
->e : number
-
-delete f.f
->delete f.f : boolean
->f.f : number
->f : Foo
->f : number
-
-delete f.g
->delete f.g : boolean
->f.g : unknown
->f : Foo
->g : unknown
-
-delete f.h
->delete f.h : boolean
->f.h : any
->f : Foo
->h : any
-
-delete f.i
->delete f.i : boolean
->f.i : never
->f : Foo
->i : never
-
-delete f.j
->delete f.j : boolean
->f.j : any
->f : Foo
->j : any
-
-delete a.a
->delete a.a : boolean
->a.a : number
->a : AA
->a : number
-
-delete a.b
->delete a.b : boolean
->a.b : number
->a : AA
->b : number
-
-delete b.a
->delete b.a : boolean
->b.a : number
->b : BB
->a : number
-
-delete b.b
->delete b.b : boolean
->b.b : number
->b : BB
->b : number
-
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).errors.txt b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).errors.txt
deleted file mode 100644
index b1cabc960096f..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).errors.txt
+++ /dev/null
@@ -1,52 +0,0 @@
-tests/cases/compiler/deleteExpressionMustBeOptional.ts(25,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/compiler/deleteExpressionMustBeOptional.ts(27,8): error TS2790: The operand of a 'delete' operator must be optional.
-tests/cases/compiler/deleteExpressionMustBeOptional.ts(34,10): error TS2339: Property 'j' does not exist on type 'Foo'.
-
-
-==== tests/cases/compiler/deleteExpressionMustBeOptional.ts (3 errors) ====
-    interface Foo {
-        a: number
-        b: number | undefined
-        c: number | null
-        d?: number
-        e: number | undefined | null
-        f?: number | undefined | null
-        g: unknown
-        h: any
-        i: never
-    }
-    
-    interface AA {
-        [s: string]: number
-    }
-    
-    type BB = {
-        [P in keyof any]: number
-    }
-    
-    declare const f: Foo
-    declare const a: AA
-    declare const b: BB
-    
-    delete f.a
-           ~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete f.b
-    delete f.c
-           ~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-    delete f.d
-    delete f.e
-    delete f.f
-    delete f.g
-    delete f.h
-    delete f.i
-    delete f.j
-             ~
-!!! error TS2339: Property 'j' does not exist on type 'Foo'.
-    
-    delete a.a
-    delete a.b
-    
-    delete b.a
-    delete b.b
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).js b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).js
deleted file mode 100644
index ca81456b4f43b..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).js
+++ /dev/null
@@ -1,58 +0,0 @@
-//// [deleteExpressionMustBeOptional.ts]
-interface Foo {
-    a: number
-    b: number | undefined
-    c: number | null
-    d?: number
-    e: number | undefined | null
-    f?: number | undefined | null
-    g: unknown
-    h: any
-    i: never
-}
-
-interface AA {
-    [s: string]: number
-}
-
-type BB = {
-    [P in keyof any]: number
-}
-
-declare const f: Foo
-declare const a: AA
-declare const b: BB
-
-delete f.a
-delete f.b
-delete f.c
-delete f.d
-delete f.e
-delete f.f
-delete f.g
-delete f.h
-delete f.i
-delete f.j
-
-delete a.a
-delete a.b
-
-delete b.a
-delete b.b
-
-//// [deleteExpressionMustBeOptional.js]
-"use strict";
-delete f.a;
-delete f.b;
-delete f.c;
-delete f.d;
-delete f.e;
-delete f.f;
-delete f.g;
-delete f.h;
-delete f.i;
-delete f.j;
-delete a.a;
-delete a.b;
-delete b.a;
-delete b.b;
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).symbols b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).symbols
deleted file mode 100644
index aad7423a133ad..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).symbols
+++ /dev/null
@@ -1,118 +0,0 @@
-=== tests/cases/compiler/deleteExpressionMustBeOptional.ts ===
-interface Foo {
->Foo : Symbol(Foo, Decl(deleteExpressionMustBeOptional.ts, 0, 0))
-
-    a: number
->a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
-
-    b: number | undefined
->b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
-
-    c: number | null
->c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
-
-    d?: number
->d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
-
-    e: number | undefined | null
->e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
-
-    f?: number | undefined | null
->f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
-
-    g: unknown
->g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
-
-    h: any
->h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
-
-    i: never
->i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
-}
-
-interface AA {
->AA : Symbol(AA, Decl(deleteExpressionMustBeOptional.ts, 10, 1))
-
-    [s: string]: number
->s : Symbol(s, Decl(deleteExpressionMustBeOptional.ts, 13, 5))
-}
-
-type BB = {
->BB : Symbol(BB, Decl(deleteExpressionMustBeOptional.ts, 14, 1))
-
-    [P in keyof any]: number
->P : Symbol(P, Decl(deleteExpressionMustBeOptional.ts, 17, 5))
-}
-
-declare const f: Foo
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->Foo : Symbol(Foo, Decl(deleteExpressionMustBeOptional.ts, 0, 0))
-
-declare const a: AA
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
->AA : Symbol(AA, Decl(deleteExpressionMustBeOptional.ts, 10, 1))
-
-declare const b: BB
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
->BB : Symbol(BB, Decl(deleteExpressionMustBeOptional.ts, 14, 1))
-
-delete f.a
->f.a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->a : Symbol(Foo.a, Decl(deleteExpressionMustBeOptional.ts, 0, 15))
-
-delete f.b
->f.b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->b : Symbol(Foo.b, Decl(deleteExpressionMustBeOptional.ts, 1, 13))
-
-delete f.c
->f.c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->c : Symbol(Foo.c, Decl(deleteExpressionMustBeOptional.ts, 2, 25))
-
-delete f.d
->f.d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->d : Symbol(Foo.d, Decl(deleteExpressionMustBeOptional.ts, 3, 20))
-
-delete f.e
->f.e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->e : Symbol(Foo.e, Decl(deleteExpressionMustBeOptional.ts, 4, 14))
-
-delete f.f
->f.f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->f : Symbol(Foo.f, Decl(deleteExpressionMustBeOptional.ts, 5, 32))
-
-delete f.g
->f.g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->g : Symbol(Foo.g, Decl(deleteExpressionMustBeOptional.ts, 6, 33))
-
-delete f.h
->f.h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->h : Symbol(Foo.h, Decl(deleteExpressionMustBeOptional.ts, 7, 14))
-
-delete f.i
->f.i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
->i : Symbol(Foo.i, Decl(deleteExpressionMustBeOptional.ts, 8, 10))
-
-delete f.j
->f : Symbol(f, Decl(deleteExpressionMustBeOptional.ts, 20, 13))
-
-delete a.a
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
-
-delete a.b
->a : Symbol(a, Decl(deleteExpressionMustBeOptional.ts, 21, 13))
-
-delete b.a
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
-
-delete b.b
->b : Symbol(b, Decl(deleteExpressionMustBeOptional.ts, 22, 13))
-
diff --git a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).types b/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).types
deleted file mode 100644
index a3d6f52b7c436..0000000000000
--- a/tests/baselines/reference/deleteExpressionMustBeOptional(strict=true).types
+++ /dev/null
@@ -1,137 +0,0 @@
-=== tests/cases/compiler/deleteExpressionMustBeOptional.ts ===
-interface Foo {
-    a: number
->a : number
-
-    b: number | undefined
->b : number | undefined
-
-    c: number | null
->c : number | null
->null : null
-
-    d?: number
->d : number | undefined
-
-    e: number | undefined | null
->e : number | null | undefined
->null : null
-
-    f?: number | undefined | null
->f : number | null | undefined
->null : null
-
-    g: unknown
->g : unknown
-
-    h: any
->h : any
-
-    i: never
->i : never
-}
-
-interface AA {
-    [s: string]: number
->s : string
-}
-
-type BB = {
->BB : BB
-
-    [P in keyof any]: number
-}
-
-declare const f: Foo
->f : Foo
-
-declare const a: AA
->a : AA
-
-declare const b: BB
->b : BB
-
-delete f.a
->delete f.a : boolean
->f.a : number
->f : Foo
->a : number
-
-delete f.b
->delete f.b : boolean
->f.b : number | undefined
->f : Foo
->b : number | undefined
-
-delete f.c
->delete f.c : boolean
->f.c : number | null
->f : Foo
->c : number | null
-
-delete f.d
->delete f.d : boolean
->f.d : number | undefined
->f : Foo
->d : number | undefined
-
-delete f.e
->delete f.e : boolean
->f.e : number | null | undefined
->f : Foo
->e : number | null | undefined
-
-delete f.f
->delete f.f : boolean
->f.f : number | null | undefined
->f : Foo
->f : number | null | undefined
-
-delete f.g
->delete f.g : boolean
->f.g : unknown
->f : Foo
->g : unknown
-
-delete f.h
->delete f.h : boolean
->f.h : any
->f : Foo
->h : any
-
-delete f.i
->delete f.i : boolean
->f.i : never
->f : Foo
->i : never
-
-delete f.j
->delete f.j : boolean
->f.j : any
->f : Foo
->j : any
-
-delete a.a
->delete a.a : boolean
->a.a : number
->a : AA
->a : number
-
-delete a.b
->delete a.b : boolean
->a.b : number
->a : AA
->b : number
-
-delete b.a
->delete b.a : boolean
->b.a : number
->b : BB
->a : number
-
-delete b.b
->delete b.b : boolean
->b.b : number
->b : BB
->b : number
-
diff --git a/tests/baselines/reference/privateNamesNoDelete.errors.txt b/tests/baselines/reference/privateNamesNoDelete.errors.txt
index e2fc11cb4ac73..d593fe107a181 100644
--- a/tests/baselines/reference/privateNamesNoDelete.errors.txt
+++ b/tests/baselines/reference/privateNamesNoDelete.errors.txt
@@ -1,15 +1,12 @@
-tests/cases/conformance/classes/members/privateNames/privateNamesNoDelete.ts(4,16): error TS2790: The operand of a 'delete' operator must be optional.
 tests/cases/conformance/classes/members/privateNames/privateNamesNoDelete.ts(4,16): error TS18011: The operand of a 'delete' operator cannot be a private identifier.
 
 
-==== tests/cases/conformance/classes/members/privateNames/privateNamesNoDelete.ts (2 errors) ====
+==== tests/cases/conformance/classes/members/privateNames/privateNamesNoDelete.ts (1 errors) ====
     class A {
         #v = 1;
         constructor() {
             delete this.#v; // Error: The operand of a delete operator cannot be a private name.
                    ~~~~~~~
-!!! error TS2790: The operand of a 'delete' operator must be optional.
-                   ~~~~~~~
 !!! error TS18011: The operand of a 'delete' operator cannot be a private identifier.
         }
     }
diff --git a/tests/cases/compiler/deleteExpressionMustBeOptional.ts b/tests/cases/compiler/deleteExpressionMustBeOptional.ts
deleted file mode 100644
index 9f84d9ea2f1e5..0000000000000
--- a/tests/cases/compiler/deleteExpressionMustBeOptional.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-// @strict: true, false
-
-interface Foo {
-    a: number
-    b: number | undefined
-    c: number | null
-    d?: number
-    e: number | undefined | null
-    f?: number | undefined | null
-    g: unknown
-    h: any
-    i: never
-}
-
-interface AA {
-    [s: string]: number
-}
-
-type BB = {
-    [P in keyof any]: number
-}
-
-declare const f: Foo
-declare const a: AA
-declare const b: BB
-
-delete f.a
-delete f.b
-delete f.c
-delete f.d
-delete f.e
-delete f.f
-delete f.g
-delete f.h
-delete f.i
-delete f.j
-
-delete a.a
-delete a.b
-
-delete b.a
-delete b.b
\ No newline at end of file