remove references to PR and Jason Malinowski as suggested

src/Compilers/Core/Portable/Compilation/ParseOptions.cs

@@ -40,7 +40,7 @@ public ParseOptions WithKind(SourceCodeKind kind)
 
         // It was supposed to be a protected implementation detail. 
         // The "pattern" we have for these is the public With* method is the only public callable one, 
-        // and that forwards to the protected Common* like all the other methods in the class (see PR #10304 comments by Jason Malinowski) 
+        // and that forwards to the protected Common* like all the other methods in the class. 
         [EditorBrowsable(EditorBrowsableState.Never)]
         public abstract ParseOptions CommonWithKind(SourceCodeKind kind);