Remove support for >>> and >>>= operators in dartc

compiler/javatests/com/google/dart/compiler/type/class_with_operators.dart

Index: compiler/javatests/com/google/dart/compiler/type/class_with_operators.dart
diff --git a/compiler/javatests/com/google/dart/compiler/type/class_with_operators.dart b/compiler/javatests/com/google/dart/compiler/type/class_with_operators.dart
index 2ff55052f07ccc55258c17c633d6719efad1793e..ead3a2e5da714cdfa2f4b3335863d441694d92c6 100644
--- a/compiler/javatests/com/google/dart/compiler/type/class_with_operators.dart
+++ b/compiler/javatests/com/google/dart/compiler/type/class_with_operators.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.
 
@@ -15,10 +15,6 @@ class ClassWithOperators {
     return 0;
   }
 
-  ClassWithOperators operator >>>(ClassWithOperators operand) {
-    return this;
-  }
-
   ClassWithOperators operator +(ClassWithOperators operand) {
     return this;
   }