Remove MIPS support

tools/testing/dart/status_reporter.dart

 // Copyright (c) 2015, 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 'dart:convert';
 
 final _combinations = {
   'linux': [
     {
       'runtimes': ['none'],
       'modes': ['release'],
       'archs': ['x64'],
       'compiler': 'dart2analyzer'
     },
     {
       'runtimes': ['vm'],
       'modes': ['debug', 'release'],
-      'archs': ['ia32', 'x64', 'simarm', 'simmips'],
+      'archs': ['ia32', 'x64', 'simarm'],
       'compiler': 'none'
     },
     {
       'runtimes': ['d8', 'jsshell', 'chrome', 'ff'],
       'modes': ['release'],
       'archs': ['ia32'],
       'compiler': 'dart2js'
     },
     {
       'runtimes': ['dartium'],
@@ skipping 177 matching lines @@
             var pct = 100 * (value / total);
             values.add('${pct.toStringAsFixed(3)}%');
           }
 
           print(values.join(','));
         }
       }
     }
   }
 }