diff --git a/packages/react/src/ReactElementValidator.js b/packages/react/src/ReactElementValidator.js
index b67f52fe9f785..1cc7bcf475990 100644
--- a/packages/react/src/ReactElementValidator.js
+++ b/packages/react/src/ReactElementValidator.js
@@ -21,7 +21,6 @@ import {
   REACT_FRAGMENT_TYPE,
   REACT_ELEMENT_TYPE,
 } from 'shared/ReactSymbols';
-import {warnAboutSpreadingKeyToJSX} from 'shared/ReactFeatureFlags';
 import checkPropTypes from 'shared/checkPropTypes';
 import isArray from 'shared/isArray';
 
@@ -365,13 +364,11 @@ export function jsxWithValidation(
               Object.freeze(children);
             }
           } else {
-            if (__DEV__) {
-              console.error(
-                'React.jsx: Static children should always be an array. ' +
-                  'You are likely explicitly calling React.jsxs or React.jsxDEV. ' +
-                  'Use the Babel transform instead.',
-              );
-            }
+            console.error(
+              'React.jsx: Static children should always be an array. ' +
+                'You are likely explicitly calling React.jsxs or React.jsxDEV. ' +
+                'Use the Babel transform instead.',
+            );
           }
         } else {
           validateChildKeys(children, type);
@@ -379,31 +376,29 @@ export function jsxWithValidation(
       }
     }
 
-    if (warnAboutSpreadingKeyToJSX) {
-      if (hasOwnProperty.call(props, 'key')) {
-        const componentName = getComponentNameFromType(type);
-        const keys = Object.keys(props).filter(k => k !== 'key');
-        const beforeExample =
-          keys.length > 0
-            ? '{key: someKey, ' + keys.join(': ..., ') + ': ...}'
-            : '{key: someKey}';
-        if (!didWarnAboutKeySpread[componentName + beforeExample]) {
-          const afterExample =
-            keys.length > 0 ? '{' + keys.join(': ..., ') + ': ...}' : '{}';
-          console.error(
-            'A props object containing a "key" prop is being spread into JSX:\n' +
-              '  let props = %s;\n' +
-              '  <%s {...props} />\n' +
-              'React keys must be passed directly to JSX without using spread:\n' +
-              '  let props = %s;\n' +
-              '  <%s key={someKey} {...props} />',
-            beforeExample,
-            componentName,
-            afterExample,
-            componentName,
-          );
-          didWarnAboutKeySpread[componentName + beforeExample] = true;
-        }
+    if (hasOwnProperty.call(props, 'key')) {
+      const componentName = getComponentNameFromType(type);
+      const keys = Object.keys(props).filter(k => k !== 'key');
+      const beforeExample =
+        keys.length > 0
+          ? '{key: someKey, ' + keys.join(': ..., ') + ': ...}'
+          : '{key: someKey}';
+      if (!didWarnAboutKeySpread[componentName + beforeExample]) {
+        const afterExample =
+          keys.length > 0 ? '{' + keys.join(': ..., ') + ': ...}' : '{}';
+        console.error(
+          'A props object containing a "key" prop is being spread into JSX:\n' +
+            '  let props = %s;\n' +
+            '  <%s {...props} />\n' +
+            'React keys must be passed directly to JSX without using spread:\n' +
+            '  let props = %s;\n' +
+            '  <%s key={someKey} {...props} />',
+          beforeExample,
+          componentName,
+          afterExample,
+          componentName,
+        );
+        didWarnAboutKeySpread[componentName + beforeExample] = true;
       }
     }
 
diff --git a/packages/react/src/__tests__/ReactElementJSX-test.js b/packages/react/src/__tests__/ReactElementJSX-test.js
index ad42046087c4d..4b7e70a073366 100644
--- a/packages/react/src/__tests__/ReactElementJSX-test.js
+++ b/packages/react/src/__tests__/ReactElementJSX-test.js
@@ -264,33 +264,31 @@ describe('ReactElement.jsx', () => {
     );
   });
 
-  if (require('shared/ReactFeatureFlags').warnAboutSpreadingKeyToJSX) {
-    it('should warn when keys are passed as part of props', () => {
-      const container = document.createElement('div');
-      class Child extends React.Component {
-        render() {
-          return JSXRuntime.jsx('div', {});
-        }
+  it('should warn when keys are passed as part of props', () => {
+    const container = document.createElement('div');
+    class Child extends React.Component {
+      render() {
+        return JSXRuntime.jsx('div', {});
       }
-      class Parent extends React.Component {
-        render() {
-          return JSXRuntime.jsx('div', {
-            children: [JSXRuntime.jsx(Child, {key: '0', prop: 'hi'})],
-          });
-        }
+    }
+    class Parent extends React.Component {
+      render() {
+        return JSXRuntime.jsx('div', {
+          children: [JSXRuntime.jsx(Child, {key: '0', prop: 'hi'})],
+        });
       }
-      expect(() =>
-        ReactDOM.render(JSXRuntime.jsx(Parent, {}), container),
-      ).toErrorDev(
-        'Warning: A props object containing a "key" prop is being spread into JSX:\n' +
-          '  let props = {key: someKey, prop: ...};\n' +
-          '  <Child {...props} />\n' +
-          'React keys must be passed directly to JSX without using spread:\n' +
-          '  let props = {prop: ...};\n' +
-          '  <Child key={someKey} {...props} />',
-      );
-    });
-  }
+    }
+    expect(() =>
+      ReactDOM.render(JSXRuntime.jsx(Parent, {}), container),
+    ).toErrorDev(
+      'Warning: A props object containing a "key" prop is being spread into JSX:\n' +
+        '  let props = {key: someKey, prop: ...};\n' +
+        '  <Child {...props} />\n' +
+        'React keys must be passed directly to JSX without using spread:\n' +
+        '  let props = {prop: ...};\n' +
+        '  <Child key={someKey} {...props} />',
+    );
+  });
 
   it('should not warn when unkeyed children are passed to jsxs', () => {
     const container = document.createElement('div');
diff --git a/packages/react/src/jsx/ReactJSXElementValidator.js b/packages/react/src/jsx/ReactJSXElementValidator.js
index 044f9a2b05948..947d806058732 100644
--- a/packages/react/src/jsx/ReactJSXElementValidator.js
+++ b/packages/react/src/jsx/ReactJSXElementValidator.js
@@ -21,7 +21,6 @@ import {
   REACT_FRAGMENT_TYPE,
   REACT_ELEMENT_TYPE,
 } from 'shared/ReactSymbols';
-import {warnAboutSpreadingKeyToJSX} from 'shared/ReactFeatureFlags';
 import hasOwnProperty from 'shared/hasOwnProperty';
 import isArray from 'shared/isArray';
 import {jsxDEV} from './ReactJSXElement';
@@ -390,31 +389,29 @@ export function jsxWithValidation(
       }
     }
 
-    if (warnAboutSpreadingKeyToJSX) {
-      if (hasOwnProperty.call(props, 'key')) {
-        const componentName = getComponentNameFromType(type);
-        const keys = Object.keys(props).filter(k => k !== 'key');
-        const beforeExample =
-          keys.length > 0
-            ? '{key: someKey, ' + keys.join(': ..., ') + ': ...}'
-            : '{key: someKey}';
-        if (!didWarnAboutKeySpread[componentName + beforeExample]) {
-          const afterExample =
-            keys.length > 0 ? '{' + keys.join(': ..., ') + ': ...}' : '{}';
-          console.error(
-            'A props object containing a "key" prop is being spread into JSX:\n' +
-              '  let props = %s;\n' +
-              '  <%s {...props} />\n' +
-              'React keys must be passed directly to JSX without using spread:\n' +
-              '  let props = %s;\n' +
-              '  <%s key={someKey} {...props} />',
-            beforeExample,
-            componentName,
-            afterExample,
-            componentName,
-          );
-          didWarnAboutKeySpread[componentName + beforeExample] = true;
-        }
+    if (hasOwnProperty.call(props, 'key')) {
+      const componentName = getComponentNameFromType(type);
+      const keys = Object.keys(props).filter(k => k !== 'key');
+      const beforeExample =
+        keys.length > 0
+          ? '{key: someKey, ' + keys.join(': ..., ') + ': ...}'
+          : '{key: someKey}';
+      if (!didWarnAboutKeySpread[componentName + beforeExample]) {
+        const afterExample =
+          keys.length > 0 ? '{' + keys.join(': ..., ') + ': ...}' : '{}';
+        console.error(
+          'A props object containing a "key" prop is being spread into JSX:\n' +
+            '  let props = %s;\n' +
+            '  <%s {...props} />\n' +
+            'React keys must be passed directly to JSX without using spread:\n' +
+            '  let props = %s;\n' +
+            '  <%s key={someKey} {...props} />',
+          beforeExample,
+          componentName,
+          afterExample,
+          componentName,
+        );
+        didWarnAboutKeySpread[componentName + beforeExample] = true;
       }
     }
 
diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js
index 63d1aae161181..7a9a02262e9cf 100644
--- a/packages/shared/ReactFeatureFlags.js
+++ b/packages/shared/ReactFeatureFlags.js
@@ -185,19 +185,6 @@ export const enableCustomElementPropertySupport = __EXPERIMENTAL__;
 // Disables children for <textarea> elements
 export const disableTextareaChildren = false;
 
-// -----------------------------------------------------------------------------
-// JSX Chopping Block
-//
-// Similar to main Chopping Block but only flags related to JSX. These are
-// grouped because we will likely batch all of them into a single major release.
-// -----------------------------------------------------------------------------
-
-// New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107
-
-// Enables a warning when trying to spread a 'key' to an element;
-// a deprecated pattern we want to get rid of in the future
-export const warnAboutSpreadingKeyToJSX = true;
-
 // -----------------------------------------------------------------------------
 // Debugging and DevTools
 // -----------------------------------------------------------------------------
diff --git a/packages/shared/forks/ReactFeatureFlags.native-fb.js b/packages/shared/forks/ReactFeatureFlags.native-fb.js
index 95a330b576c12..136a920fafe93 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-fb.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-fb.js
@@ -45,7 +45,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = true;
diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js
index d8a1d8c5d7427..8441d9476804a 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-oss.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-oss.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
index 92a4ecaf5dfad..ffb690e6d2926 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js
index dd2c58d33f4ec..79cb7c6de7c4d 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableComponentStackLocations = false;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
index 78652d8835bb2..42c2d95c88e3b 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = true;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = true;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.testing.js b/packages/shared/forks/ReactFeatureFlags.testing.js
index 72a1a74523dc0..29185c128657f 100644
--- a/packages/shared/forks/ReactFeatureFlags.testing.js
+++ b/packages/shared/forks/ReactFeatureFlags.testing.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.testing.www.js b/packages/shared/forks/ReactFeatureFlags.testing.www.js
index d5bc91306df4a..f1e39456d7e9f 100644
--- a/packages/shared/forks/ReactFeatureFlags.testing.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.testing.www.js
@@ -35,7 +35,6 @@ export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = __EXPERIMENTAL__;
 export const disableModulePatternComponents = true;
-export const warnAboutSpreadingKeyToJSX = true;
 export const enableSuspenseAvoidThisFallback = true;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = true;
diff --git a/packages/shared/forks/ReactFeatureFlags.www-dynamic.js b/packages/shared/forks/ReactFeatureFlags.www-dynamic.js
index b2882118be1d7..b0a4261362516 100644
--- a/packages/shared/forks/ReactFeatureFlags.www-dynamic.js
+++ b/packages/shared/forks/ReactFeatureFlags.www-dynamic.js
@@ -13,7 +13,6 @@
 // Use __VARIANT__ to simulate a GK. The tests will be run twice: once
 // with the __VARIANT__ set to `true`, and once set to `false`.
 
-export const warnAboutSpreadingKeyToJSX = __VARIANT__;
 export const disableInputAttributeSyncing = __VARIANT__;
 export const enableFilterEmptyStringAttributesDOM = __VARIANT__;
 export const enableLegacyFBSupport = __VARIANT__;
diff --git a/packages/shared/forks/ReactFeatureFlags.www.js b/packages/shared/forks/ReactFeatureFlags.www.js
index 6cc8f83172930..83e3f877c7f1a 100644
--- a/packages/shared/forks/ReactFeatureFlags.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.www.js
@@ -18,7 +18,6 @@ export const {
   disableInputAttributeSyncing,
   enableTrustedTypesIntegration,
   disableSchedulerTimeoutBasedOnReactExpirationTime,
-  warnAboutSpreadingKeyToJSX,
   replayFailedUnitOfWorkWithInvokeGuardedCallback,
   enableFilterEmptyStringAttributesDOM,
   enableLegacyFBSupport,