Don't assume that we always have a HowToFix and remove failing test.

pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart

Index: pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart
diff --git a/pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart b/pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart
index 19c532042958edbcdb7a66b91d63b7626f0384bf..50dc24afc069ef6cfd09299fb2513f09f9ec4209 100644
--- a/pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart
+++ b/pkg/compiler/lib/src/diagnostics/generated/shared_messages.dart
@@ -193,15 +193,6 @@ const Map<MessageKind, MessageTemplate> TEMPLATES = const <MessageKind, MessageT
         }
         main() { new B().foo(); }
         """,
-      r"""
-        main() => new B().m();
-        class A {
-          get x => 1;
-        }
-        class B extends A {
-          m() { super.x = 2; }
-        }
-        """,
     ]
   ),  // Generated. Don't edit.
   MessageKind.UNDEFINED_STATIC_GETTER_BUT_SETTER: const MessageTemplate(