Revert "Implements support for ignoring method type arguments in resolution."

pkg/compiler/lib/src/serialization/modelz.dart

Index: pkg/compiler/lib/src/serialization/modelz.dart
diff --git a/pkg/compiler/lib/src/serialization/modelz.dart b/pkg/compiler/lib/src/serialization/modelz.dart
index c9f069b17ec94ec0ca158e6dc85944879d7f4c0a..c7a347a1635086928df517c249a0cdcb560f1f66 100644
--- a/pkg/compiler/lib/src/serialization/modelz.dart
+++ b/pkg/compiler/lib/src/serialization/modelz.dart
@@ -758,9 +758,6 @@ abstract class FunctionTypedElementMixin
     return _decoder.getBool(Key.IS_EXTERNAL,
         isOptional: true, defaultValue: false);
   }
-
-  @override
-  List<DartType> get typeVariables => functionSignature.typeVariables;
 }
 
 abstract class ClassElementMixin implements ElementZ, ClassElement {
@@ -1332,9 +1329,6 @@ class ForwardingConstructorElementZ extends ElementZ
     // variables correctly.
     return definingConstructor.type;
   }
-
-  @override
-  List<DartType> get typeVariables => _unsupported("typeVariables");
 }
 
 abstract class MemberElementMixin
@@ -1874,9 +1868,6 @@ abstract class ParameterElementZ extends DeserializedElementZ
 
   @override
   MemberElement get memberContext => executableContext.memberContext;
-
-  @override
-  List<DartType> get typeVariables => functionSignature.typeVariables;
 }
 
 class LocalParameterElementZ extends ParameterElementZ