Remove deprecated code

pkg/analyzer/lib/src/generated/parser.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 engine.parser;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'ast.dart';
@@ skipping 2169 matching lines @@
    */
   bool get hasReturnTypeInTypeAlias {
     Token next = _skipReturnType(_currentToken);
     if (next == null) {
       return false;
     }
     return _tokenMatchesIdentifier(next);
   }
 
   /**
-   * Set whether the parser is to parse the async support.
-   */
-  @deprecated
-  void set parseAsync(bool parseAsync) {
-    // Async support cannot be disabled
-  }
-
-  /**
-   * Set whether the parser is to parse deferred libraries.
-   */
-  @deprecated
-  void set parseDeferredLibraries(bool parseDeferredLibraries) {
-    // Deferred libraries support cannot be disabled
-  }
-
-  /**
-   * Set whether the parser is to parse enum declarations.
-   */
-  @deprecated
-  void set parseEnum(bool parseEnum) {
-    // Enum support cannot be disabled
-  }
-
-  /**
    * Set whether parser is to parse function bodies.
    */
   void set parseFunctionBodies(bool parseFunctionBodies) {
     this._parseFunctionBodies = parseFunctionBodies;
   }
 
   /**
    * Advance to the next token in the token stream, making it the new current
    * token and return the token that was current before this method was invoked.
    */
@@ skipping 9086 matching lines @@
   }
 
   /**
    * Copy resolution data from the [fromNode] to the [toNode].
    */
   static void copyResolutionData(AstNode fromNode, AstNode toNode) {
     ResolutionCopier copier = new ResolutionCopier();
     copier._isEqualNodes(fromNode, toNode);
   }
 }