Elements. Remove TypeParameterizedElementImpl.

Change-Id: I9868b973054d431551e8e35707694317b716e0d8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/441321
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/lib/src/dart/element/element.dart

@@ -3806,7 +3806,7 @@ sealed class FunctionFragmentImpl extends ExecutableFragmentImpl
   ExecutableFragmentImpl get declaration => this;
 }
 
-abstract class FunctionTypedElementImpl extends TypeParameterizedElementImpl
+abstract class FunctionTypedElementImpl extends ElementImpl
     implements FunctionTypedElement {
   @override
   void visitChildren<T>(ElementVisitor2<T> visitor) {
@@ -10176,9 +10176,6 @@ class TypeParameterFragmentImpl extends FragmentImpl
   }
 }
 
-abstract class TypeParameterizedElementImpl extends ElementImpl
-    implements TypeParameterizedElement {}
-
 /// Mixin representing an element which can have type parameters.
 mixin TypeParameterizedFragmentMixin on FragmentImpl
     implements