fix Library*NegativeTests (and a couple Prefix ones by accident)

frog/lib/corelib.dart

Index: frog/lib/corelib.dart
diff --git a/frog/lib/corelib.dart b/frog/lib/corelib.dart
index b2f633eeac975d0c31ba0dad7026dbc473c6f00a..23c59f13f4feb7708891e2791d68004252929061 100644
--- a/frog/lib/corelib.dart
+++ b/frog/lib/corelib.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
@@ -129,18 +129,6 @@ class Object native "Object" {
   }
 }
 
-LinkedHashMapImplementation _map(List itemsAndKeys) {
-  LinkedHashMapImplementation ret = new LinkedHashMapImplementation();
-  for (int i=0; i < itemsAndKeys.length;) {
-    ret[itemsAndKeys[i++]] = itemsAndKeys[i++];
-  }
-  return ret;
-}
-
-ImmutableMap _constMap(List itemsAndKeys) {
-  return new ImmutableMap(itemsAndKeys);
-}
-
 void _assert(var test, String text, String url, int line, int column) {
   if (test is Function) test = test();
   if (!test) throw new AssertionError._internal(text, url, line, column);