Remove dead code.

pkg/analyzer/lib/src/context/context.dart

 // Copyright (c) 2015, 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 analyzer.src.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/instrumentation/instrumentation.dart';
@@ skipping 1293 matching lines @@
   bool _contains(List<Source> sources, Source targetSource) {
     for (Source source in sources) {
       if (source == targetSource) {
         return true;
       }
     }
     return false;
   }
 
   /**
-   * Return `true` if the given list of [sources] contains any of the given
-   * [targetSources].
-   */
-  bool _containsAny(List<Source> sources, List<Source> targetSources) {
-    for (Source targetSource in targetSources) {
-      if (_contains(sources, targetSource)) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /**
    * Set the contents of the given [source] to the given [contents] and mark the
    * source as having changed. The additional [offset], [oldLength] and
    * [newLength] information is used by the context to determine what reanalysis
    * is necessary. The method [setChangedContents] triggers a source changed
    * event where as this method does not.
    */
   bool _contentRangeChanged(Source source, String contents, int offset,
       int oldLength, int newLength) {
     bool changed = false;
     String originalContents = _contentCache.setContents(source, contents);
@@ skipping 665 matching lines @@
     PendingFuture pendingFuture =
         new PendingFuture<T>(_context, target, computeValue);
     if (!pendingFuture.evaluate(entry)) {
       _context._pendingFutureTargets
           .putIfAbsent(target, () => <PendingFuture>[])
           .add(pendingFuture);
     }
     return pendingFuture.future;
   }
 }