fix #27040, promote the upper bound of a type parameter

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

Index: pkg/analyzer/lib/src/dart/element/member.dart
diff --git a/pkg/analyzer/lib/src/dart/element/member.dart b/pkg/analyzer/lib/src/dart/element/member.dart
index d498728b9ef73c41cd2ad500978ebe1d6d45a03e..6210e7702455e4f246132f4805cb3bd60af130d1 100644
--- a/pkg/analyzer/lib/src/dart/element/member.dart
+++ b/pkg/analyzer/lib/src/dart/element/member.dart
@@ -923,12 +923,6 @@ class TypeParameterMember extends Member implements TypeParameterElement {
   TypeParameterType get type => _type;
 
   @override
-  bool operator ==(obj) =>
-      // TODO(jmesserly): this equality should consider the bound, see:
-      // https://github.com/dart-lang/sdk/issues/27210
-      obj is TypeParameterMember && obj.baseElement == baseElement;
-
-  @override
   accept(ElementVisitor visitor) => visitor.visitTypeParameterElement(this);
 
   /**