Add missing E0192 in the error code listing

Author: GuillaumeGomez

compiler/rustc_error_codes/src/error_codes.rs

@@ -97,6 +97,7 @@ E0184: include_str!("./error_codes/E0184.md"),
 E0185: include_str!("./error_codes/E0185.md"),
 E0186: include_str!("./error_codes/E0186.md"),
 E0191: include_str!("./error_codes/E0191.md"),
+E0192: include_str!("./error_codes/E0192.md"),
 E0193: include_str!("./error_codes/E0193.md"),
 E0195: include_str!("./error_codes/E0195.md"),
 E0197: include_str!("./error_codes/E0197.md"),
@@ -522,7 +523,6 @@ E0787: include_str!("./error_codes/E0787.md"),
 //  E0188, // can not cast an immutable reference to a mutable pointer
 //  E0189, // deprecated: can only cast a boxed pointer to a boxed object
 //  E0190, // deprecated: can only cast a &-pointer to an &-object
-//  E0192, // negative impl only applicable to auto traits
 //  E0194, // merged into E0403
 //  E0196, // cannot determine a type for this closure
     E0208,

compiler/rustc_error_codes/src/error_codes/E0192.md

@@ -1,15 +1,17 @@
+#### Note: this error code is no longer emitted by the compiler.
+
 A negative impl was added on a trait implementation.
 
 Erroneous code example:
 
-```compile_fail,E0192
+```compile_fail
 trait Trait {
     type Bar;
 }
 
 struct Foo;
 
-impl !Trait for Foo { } //~ ERROR E0192
+impl !Trait for Foo { } //~ ERROR
 
 fn main() {}
 ```