Revert "dart2js_mirrors_test added"

tests/lib/mirrors/dart2js_mirrors_test.dart

Index: tests/lib/mirrors/dart2js_mirrors_test.dart
diff --git a/tests/lib/mirrors/dart2js_mirrors_test.dart b/tests/lib/mirrors/dart2js_mirrors_test.dart
deleted file mode 100644
index e9e0af090b0d4c0a846654bd43080e72be3472ce..0000000000000000000000000000000000000000
--- a/tests/lib/mirrors/dart2js_mirrors_test.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-#library('dart2js_mirrors_test');
-
-#import('dart:mirrors');
-#import("../../../pkg/unittest/unittest.dart");
-
-void main() {
-  try {
-    print(currentMirrorSystem());
-    fail("UnsupportedOperationException expected");
-  } on UnsupportedOperationException catch (e) {
-    print(e);
-  }
-  try {
-    print(mirrorSystemOf(null));
-    fail("UnsupportedOperationException expected");
-  } on UnsupportedOperationException catch (e) {
-    print(e);
-  }
-  try {
-    print(reflect(null));
-    fail("UnsupportedOperationException expected");
-  } on UnsupportedOperationException catch (e) {
-    print(e);
-  }
-}