Deprecate the generated element library and clean up imports

pkg/analyzer/lib/src/generated/utilities_dart.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 analyzer.src.generated.utilities_dart;
 
 import 'package:analyzer/dart/ast/ast.dart' show AnnotatedNode, Comment;
 import 'package:analyzer/dart/ast/token.dart' show Token;
-import 'package:analyzer/src/generated/element.dart' show ElementImpl;
+import 'package:analyzer/src/dart/element/element.dart' show ElementImpl;
 import 'package:analyzer/src/generated/java_core.dart';
 
 /**
  * If the given [node] has a documentation comment, remember its content
  * and range into the given [element].
  */
 void setElementDocumentationComment(ElementImpl element, AnnotatedNode node) {
   Comment comment = node.documentationComment;
   if (comment != null && comment.isDocumentation) {
     element.documentationComment =
@@ skipping 52 matching lines @@
   final bool isOptional;
 
   /**
    * Initialize a newly created kind with the given state.
    *
    * @param isOptional `true` if this is an optional parameter
    */
   const ParameterKind(String name, int ordinal, this.isOptional)
       : super(name, ordinal);
 }