Stop using the Hashable interface.

lib/compiler/implementation/universe/universe.dart

 // 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.
 
 #library('universe');
 
 #import('../closure.dart');
 #import('../elements/elements.dart');
 #import('../leg.dart');
 #import('../scanner/scannerlib.dart');
@@ skipping 101 matching lines @@
 
   static const SelectorKind GETTER = const SelectorKind('getter');
   static const SelectorKind SETTER = const SelectorKind('setter');
   static const SelectorKind CALL = const SelectorKind('call');
   static const SelectorKind OPERATOR = const SelectorKind('operator');
   static const SelectorKind INDEX = const SelectorKind('index');
 
   toString() => name;
 }
 
-class Selector implements Hashable {
+class Selector {
   final SelectorKind kind;
   final SourceString name;
   final LibraryElement library; // Library is null for non-private selectors.
 
   // The numbers of arguments of the selector. Includes named arguments.
   final int argumentCount;
   final List<SourceString> namedArguments;
   final List<SourceString> orderedNamedArguments;
 
   Selector(
@@ skipping 392 matching lines @@
 
     if (!self.isInterface() && self.isSubclassOf(other)) {
       // Resolve an invocation of [element.name] on [self]. If it
       // is found, this selector is a candidate.
       return hasElementIn(self, element) && appliesUntyped(element, compiler);
     }
 
     return false;
   }
 }