Remove excessive check.

pkg/analysis_server/lib/src/services/correction/util.dart

 // Copyright (c) 2014, 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 services.src.correction.util;
 
 import 'dart:math';
 
 import 'package:analysis_server/src/protocol.dart' show SourceEdit;
 import 'package:analysis_server/src/services/correction/source_range.dart';
@@ skipping 401 matching lines @@
  * Checks if the given [Element]'s display name equals to the given name.
  */
 bool hasDisplayName(Element element, String name) {
   if (element == null) {
     return false;
   }
   return element.displayName == name;
 }
 
 /**
- * Checks if the given [PropertyAccessorElement] is an accessor of a class
+ * Checks if the given [PropertyAccessorElement] is an accessor of a
  * [FieldElement].
  */
-bool isClassFieldAccessorElement(PropertyAccessorElement accessor) {
-  return accessor != null &&
-      accessor.variable is FieldElement &&
-      accessor.variable.enclosingElement is ClassElement;
+bool isFieldAccessorElement(PropertyAccessorElement accessor) {
+  return accessor != null && accessor.variable is FieldElement;
 }
 
 
 /**
  * Checks if given [DartNode] is the left hand side of an assignment, or a
  * declaration of a variable.
  */
 bool isLeftHandOfAssignment(SimpleIdentifier node) {
   if (node.inSetterContext()) {
     return true;
@@ skipping 930 matching lines @@
 
   @override
   Object visitExpression(Expression node) {
     if (node is BinaryExpression && node.operator.type == groupOperatorType) {
       return super.visitNode(node);
     }
     operands.add(node);
     return null;
   }
 }