Remove unused API.

dart/sdk/lib/_internal/compiler/implementation/scanner/parser.dart

 // Copyright (c) 2012, 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.
 
 part of scanner;
 
 class FormalParameterType {
   final String type;
   const FormalParameterType(this.type);
   bool get isRequired => this == REQUIRED;
@@ skipping 413 matching lines @@
   }
 
   Token parseQualifiedRest(Token token) {
     assert(optional('.', token));
     Token period = token;
     token = parseIdentifier(token.next);
     listener.handleQualified(period);
     return token;
   }
 
-  bool isDefaultKeyword(Token token) {
-    String value = token.stringValue;
-    if (identical(value, 'default')) return true;
-    if (identical(value, 'factory')) {
-      listener.recoverableError("expected 'default'", token: token);
-      return true;
-    }
-    return false;
-  }
-
   Token skipBlock(Token token) {
     if (!optional('{', token)) {
       return listener.expectedBlockToSkip(token);
     }
     BeginGroupToken beginGroupToken = token;
     Token endGroup = beginGroupToken.endGroup;
     if (endGroup == null) {
       return listener.unmatched(beginGroupToken);
     } else if (!identical(endGroup.kind, $CLOSE_CURLY_BRACKET)) {
       return listener.unmatched(beginGroupToken);
@@ skipping 1982 matching lines @@
     }
     listener.handleContinueStatement(hasTarget, continueKeyword, token);
     return expectSemicolon(token);
   }
 
   Token parseEmptyStatement(Token token) {
     listener.handleEmptyStatement(token);
     return expectSemicolon(token);
   }
 }