Revert "Handle named mixin application in emitter"

pkg/compiler/lib/src/resolution/resolution_strategy.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.resolution_strategy;
 
 import 'package:front_end/src/fasta/scanner.dart' show Token;
 
 import '../common.dart';
 import '../common_elements.dart';
@@ skipping 390 matching lines @@
     cls.ensureResolved(_resolution);
     return cls.rawType;
   }
 
   @override
   bool isGenericClass(ClassEntity cls) {
     return getThisType(cls).typeArguments.isNotEmpty;
   }
 
   @override
-  bool isMixinApplication(ClassElement cls) {
-    return cls.isMixinApplication;
-  }
-
-  @override
   bool isUnnamedMixinApplication(ClassElement cls) {
     return cls.isUnnamedMixinApplication;
   }
 
   @override
   ResolutionDartType getTypeVariableBound(TypeVariableElement typeVariable) {
     return typeVariable.bound;
   }
 
   @override
@@ skipping 421 matching lines @@
   @override
   WorkItem createWorkItem(MemberElement element) {
     assert(element.isDeclaration, failedAt(element));
     if (element.isMalformed) return null;
 
     assert(element is AnalyzableElement,
         failedAt(element, 'Element $element is not analyzable.'));
     return _resolution.createWorkItem(element);
   }
 }