Elements. Remove PropertyInducingElementOrMember.

Change-Id: Ia20cb3f2e6523930afbe9d580dc8126298d36c8c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/438261
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

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

@@ -8661,14 +8661,6 @@ abstract class PropertyInducingElementImpl extends VariableElementImpl
   List<PropertyInducingFragmentImpl> get _fragments;
 }
 
-/// Common base class for all analyzer-internal classes that implement
-/// `PropertyInducingElement`.
-abstract class PropertyInducingElementOrMember
-    implements VariableElementOrMember {
-  @override
-  TypeImpl get type;
-}
-
 /// Instances of this class are set for fields and top-level variables
 /// to perform top-level type inference during linking.
 abstract class PropertyInducingElementTypeInference {
@@ -8678,7 +8670,7 @@ abstract class PropertyInducingElementTypeInference {
 abstract class PropertyInducingFragmentImpl
     extends NonParameterVariableFragmentImpl
     with AugmentableFragment, DeferredResolutionReadingMixin
-    implements PropertyInducingElementOrMember, PropertyInducingFragment {
+    implements PropertyInducingFragment {
   @override
   final String? name2;
 

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

@@ -402,17 +402,6 @@ extension PropertyInducingElementExtension on PropertyInducingElement {
   }
 }
 
-extension PropertyInducingElementOrMemberExtension
-    on PropertyInducingElementOrMember {
-  PropertyInducingElement2OrMember get asElement2 {
-    return switch (this) {
-      PropertyInducingFragmentImpl(:var element) => element,
-      FieldMember member => member,
-      _ => throw UnsupportedError('Unsupported type: $runtimeType'),
-    };
-  }
-}
-
 extension SetterElementImplExtension on SetterElementImpl {
   PropertyAccessorFragmentImpl get asElement {
     return lastFragment;