Remove IMPORT_EXPORT_SOURCE_CLOSURE and IS_CLIENT results.

pkg/analyzer/lib/task/dart.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.task.dart;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 50 matching lines @@
  *
  * The list will be empty if there are no parts, but will not be `null`. The
  * list does *not* include the source for the defining compilation unit.
  *
  * The result is only available for [Source]s representing a library.
  */
 final ListResultDescriptor<Source> INCLUDED_PARTS =
     new ListResultDescriptor<Source>('INCLUDED_PARTS', Source.EMPTY_LIST);
 
 /**
- * A flag specifying whether a library is dependent on code that is only
- * available in a client.
- *
- * The result is only available for [Source]s representing a library.
- */
-final ResultDescriptor<bool> IS_CLIENT =
-    new ResultDescriptor<bool>('IS_CLIENT', false);
-
-/**
  * A flag specifying whether a library is launchable.
  *
  * The result is only available for [Source]s representing a library.
  */
 final ResultDescriptor<bool> IS_LAUNCHABLE =
     new ResultDescriptor<bool>('IS_LAUNCHABLE', false);
 
 /**
  * The fully built [LibraryElement] associated with a library.
  *
@@ skipping 91 matching lines @@
   @override
   bool operator ==(other) {
     return other is LibrarySpecificUnit &&
         other.library == library &&
         other.unit == unit;
   }
 
   @override
   String toString() => '$unit in $library';
 }