remove tests from code that was recently deleted.

tools/test.dart

 #!/usr/bin/env 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.
 
 /**
  * This file is the entrypoint of the dart test suite.  This suite is used
  * to test:
  *
  *     1. the dart vm
@@ skipping 28 matching lines @@
 #import("../samples/tests/samples/test_config.dart");
 #import("../client/tests/dartc/test_config.dart");
 #import("../compiler/tests/dartc/test_config.dart");
 #import("../client/tests/client/test_config.dart");
 #import("../frog/tests/frog/test_config.dart");
 #import("../frog/tests/leg/test_config.dart");
 #import("../frog/tests/leg_only/test_config.dart");
 #import("../frog/tests/native/test_config.dart");
 #import("../frog/tests/await/test_config.dart");
 #import("../utils/tests/css/test_config.dart");
-#import("../utils/tests/import_mapper/test_config.dart");
 
 /**
  * The directories that contain test suites which follow the conventions
  * required by [DirectoryTestSuite]. Ideally, we'd move more suites to this
  * convention because it makes it much simpler to add them to test.dart. (You
  * basically add the directory here and you're done.)
 */
 final TEST_SUITE_DIRECTORIES = const [
   'utils/tests/peg',
   'utils/tests/pub',
@@ skipping 75 matching lines @@
     }
     if (conf['compiler'] == 'dartc' && selectors.containsKey('dartc')) {
       queue.addTestSuite(new ClientDartcTestSuite(conf));
     }
     if (conf['compiler'] == 'dartc' && selectors.containsKey('dartc')) {
       queue.addTestSuite(new JUnitDartcTestSuite(conf));
     }
     if (selectors.containsKey('css')) {
       queue.addTestSuite(new CssTestSuite(conf));
     }
-    if (selectors.containsKey('import_mapper')) {
-      queue.addTestSuite(new ImportMapperTestSuite(conf));
-    }
     if (selectors.containsKey('await')) {
       queue.addTestSuite(new AwaitTestSuite(conf));
     }
     if (selectors.containsKey('client')) {
       queue.addTestSuite(new ClientTestSuite(conf));
     }
 
     for (final testSuiteDir in TEST_SUITE_DIRECTORIES) {
       final name = testSuiteDir.substring(testSuiteDir.lastIndexOf('/') + 1);
       if (selectors.containsKey(name)) {
         queue.addTestSuite(
             new StandardTestSuite.forDirectory(conf, testSuiteDir));
       }
     }
 
     return true;
   }
 
   // Start process queue.
   var queue = new ProcessQueue(maxProcesses,
                                progressIndicator,
                                startTime,
                                printTiming,
                                enqueueConfiguration,
                                verbose,
                                listTests,
                                keepGeneratedTests);
 }