Clean up imports in analysis_server and analyzer_cli (and one missed in analyzer)

pkg/analysis_server/lib/src/services/refactoring/convert_method_to_getter.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.refactoring.convert_method_to_getter;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol_server.dart' hide Element;
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring_internal.dart';
 import 'package:analysis_server/src/services/search/hierarchy.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
+import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * [ConvertMethodToGetterRefactoring] implementation.
  */
 class ConvertMethodToGetterRefactoringImpl extends RefactoringImpl
     implements ConvertMethodToGetterRefactoring {
   final SearchEngine searchEngine;
   final ExecutableElement element;
 
@@ skipping 101 matching lines @@
       }
       // we need invocation
       if (invocation != null) {
         SourceRange range = rangeEndEnd(refRange, invocation);
         SourceEdit edit = newSourceEdit_range(range, '');
         doSourceChange_addElementEdit(change, refElement, edit);
       }
     }
   }
 }