Remove unused methods in analysis_server.

pkg/analysis_server/lib/src/services/index/store/codec.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.index.store.codec;
 
 import 'dart:collection';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/store/collection.dart';
@@ skipping 185 matching lines @@
       } else {
         firstComponent = 'null';
       }
     }
     String lastComponent = element.displayName;
     int firstId = _stringCodec.encode(firstComponent);
     int lastId = _stringCodec.encode(lastComponent);
     return <int>[firstId, lastId];
   }
 
-  static String _getComponentUnit(Element element) {
-    LibraryElement libraryElement = element.library;
-    if (libraryElement == null) {
-      return 'null';
-    }
-    return libraryElement.definingCompilationUnit.source.fullName;
-  }
-
   static bool _hasLocalOffset(List<String> components) {
     for (String component in components) {
       if (component.indexOf('@') != -1) {
         return true;
       }
     }
     return false;
   }
-
-  static String _substringBeforeAt(String str) {
-    int atOffset = str.indexOf('@');
-    if (atOffset != -1) {
-      str = str.substring(0, atOffset);
-    }
-    return str;
-  }
 }
 
 
 /**
  * A helper that encodes/decodes [Relationship]s to/from integers.
  */
 class RelationshipCodec {
   final StringCodec _stringCodec;
 
   RelationshipCodec(this._stringCodec);
@@ skipping 35 matching lines @@
   int encode(String name) {
     int index = nameToIndex[name];
     if (index == null) {
       index = _indexToName.length;
       nameToIndex[name] = index;
       _indexToName.add(name);
     }
     return index;
   }
 }