Remove unused methods in analysis_server.

pkg/analysis_server/lib/src/computer/computer_navigation.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 computer.navigation;
 
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 31 matching lines @@
     protocol.Element target = protocol.newElement_fromEngine(element);
     _regions.add(new protocol.NavigationRegion(offset, length, [target]));
   }
 
   void _addRegion_nodeStart_nodeEnd(AstNode a, AstNode b, Element element) {
     int offset = a.offset;
     int length = b.end - offset;
     _addRegion(offset, length, element);
   }
 
-  void _addRegion_nodeStart_nodeStart(AstNode a, AstNode b, Element element,
-      {bool excludeLastChar: false}) {
-    int offset = a.offset;
-    int length = b.offset - offset;
-    if (excludeLastChar) {
-      length--;
-    }
-    _addRegion(offset, length, element);
-  }
-
   void _addRegion_tokenStart_nodeEnd(Token a, AstNode b, Element element) {
     int offset = a.offset;
     int length = b.end - offset;
     _addRegion(offset, length, element);
   }
 
   void _addRegionForNode(AstNode node, Element element) {
     int offset = node.offset;
     int length = node.length;
     _addRegion(offset, length, element);
@@ skipping 155 matching lines @@
     Element element = node.bestElement;
     computer._addRegionForNode(node, element);
   }
 
   void _safelyVisit(AstNode node) {
     if (node != null) {
       node.accept(this);
     }
   }
 }