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.
 
 library runtime_configuration;
 
 import 'dart:io' show Directory, File;
 
 import 'compiler_configuration.dart' show CommandArtifact;
 
@@ skipping 166 matching lines @@
   DartVmRuntimeConfiguration() : super._subclass();
 
   int computeTimeoutMultiplier(
       {String mode, bool isChecked: false, bool isReload: false, String arch}) {
     int multiplier = 1;
     switch (arch) {
       case 'simarm':
       case 'arm':
       case 'simarmv6':
       case 'armv6':
-      case ' simarmv5te':
+      case 'simarmv5te':
       case 'armv5te':
-      case 'simmips':
-      case 'mips':
       case 'simarm64':
       case 'simdbc':
       case 'simdbc64':
         multiplier *= 4;
         break;
     }
     if (mode == 'debug') {
       multiplier *= 2;
       if (isReload) {
         multiplier *= 2;
@@ skipping 156 matching lines @@
 class DummyRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     throw "Unimplemented runtime '$runtimeType'";
   }
 }