Drop the 'occurrences' field from the EXTRACT_METHOD refactoring feedback.

pkg/analysis_server/test/integration/protocol_matchers.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/spec/generate_files".
 
 /**
  * Matchers for data types defined in the analysis server API
@@ skipping 1812 matching lines @@
 /**
  * extractMethod feedback
  *
  * {
  *   "offset": int
  *   "length": int
  *   "returnType": String
  *   "names": List<String>
  *   "canCreateGetter": bool
  *   "parameters": List<RefactoringMethodParameter>
- *   "occurrences": int
  *   "offsets": List<int>
  *   "lengths": List<int>
  * }
  */
 final Matcher isExtractMethodFeedback = new LazyMatcher(() => new MatchesJsonObject(
   "extractMethod feedback", {
     "offset": isInt,
     "length": isInt,
     "returnType": isString,
     "names": isListOf(isString),
     "canCreateGetter": isBool,
     "parameters": isListOf(isRefactoringMethodParameter),
-    "occurrences": isInt,
     "offsets": isListOf(isInt),
     "lengths": isListOf(isInt)
   }));
 
 /**
  * extractMethod options
  *
  * {
  *   "returnType": String
  *   "createGetter": bool
@@ skipping 59 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));