remove tests from code that was recently deleted.

tools/test.dart

Index: tools/test.dart
diff --git a/tools/test.dart b/tools/test.dart
index 543a493f8dcd8493bbd3d7734d3e06415a315646..9cdf5a909adb54243ef3a1f2c49171d80fe17c2e 100755
--- a/tools/test.dart
+++ b/tools/test.dart
@@ -46,7 +46,6 @@
 #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
@@ -142,9 +141,6 @@ main() {
     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));
     }