Remove MIPS support

tools/testing/dart/runtime_configuration.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.
 
 import 'dart:io';
 
 import 'command.dart';
 import 'compiler_configuration.dart';
 import 'configuration.dart';
 // TODO(ahe): Remove this import, we can precompute all the values required
@@ skipping 163 matching lines @@
       Architecture arch}) {
     var multiplier = 1;
 
     switch (arch) {
       case Architecture.simarm:
       case Architecture.arm:
       case Architecture.simarmv6:
       case Architecture.armv6:
       case Architecture.simarmv5te:
       case Architecture.armv5te:
-      case Architecture.simmips:
-      case Architecture.mips:
       case Architecture.simarm64:
       case Architecture.simdbc:
       case Architecture.simdbc64:
         multiplier *= 4;
         break;
     }
 
     if (mode.isDebug) {
       multiplier *= 2;
       if (isReload) {
@@ skipping 150 matching lines @@
 // TODO(ahe): Remove this class.
 class DummyRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     throw "Unimplemented runtime '$runtimeType'";
   }
 }