Remove unused or unneeded stuff from java_core.dart.

pkg/analyzer/lib/dart/ast/ast.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.
 
 /**
  * Defines the AST model. The AST (Abstract Syntax Tree) model describes the
  * syntactic (as opposed to semantic) structure of Dart code. The semantic
  * structure of the code is modeled by the
  * [element model](../element/element.dart).
  *
@@ skipping 22 matching lines @@
  * When an AST is resolved, the identifiers in the AST will be associated with
  * the elements that they refer to and every expression in the AST will have a
  * type associated with it.
  */
 library analyzer.dart.ast.ast;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/ast/ast.dart';
 import 'package:analyzer/src/dart/element/element.dart' show AuxiliaryElements;
-import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart' show LineInfo, Source;
 import 'package:analyzer/src/generated/utilities_dart.dart';
 
 /**
  * Two or more string literals that are implicitly concatenated because of being
  * adjacent (separated only by whitespace).
  *
  * While the grammar only allows adjacent strings when all of the strings are of
@@ skipping 4439 matching lines @@
       }
     }
     // test lengths of combinator lists first
     if (allHides1.length != allHides2.length) {
       return allHides1.length - allHides2.length;
     }
     if (allShows1.length != allShows2.length) {
       return allShows1.length - allShows2.length;
     }
     // next ensure that the lists are equivalent
-    if (!javaCollectionContainsAll(allHides1, allHides2)) {
+    if (!allHides1.toSet().containsAll(allHides2)) {
       return -1;
     }
-    if (!javaCollectionContainsAll(allShows1, allShows2)) {
+    if (!allShows1.toSet().containsAll(allShows2)) {
       return -1;
     }
     return 0;
   };
 
   /**
    * Initialize a newly created import directive. Either or both of the
    * [comment] and [metadata] can be `null` if the function does not have the
    * corresponding attribute. The [deferredKeyword] can be `null` if the import
    * is not deferred. The [asKeyword] and [prefix] can be `null` if the import
@@ skipping 3494 matching lines @@
   /**
    * Return the 'yield' keyword.
    */
   Token get yieldKeyword;
 
   /**
    * Return the 'yield' keyword to the given [token].
    */
   void set yieldKeyword(Token token);
 }