Revert "Fix for queue closed crash"

tests/compiler/dart2js_extra/mirror_enqueuer_regression_test.dart

Index: tests/compiler/dart2js_extra/mirror_enqueuer_regression_test.dart
diff --git a/tests/compiler/dart2js_extra/mirror_enqueuer_regression_test.dart b/tests/compiler/dart2js_extra/mirror_enqueuer_regression_test.dart
deleted file mode 100644
index 5fd7b428a8c46b7b71e74b57def750e9ebc2cdd8..0000000000000000000000000000000000000000
--- a/tests/compiler/dart2js_extra/mirror_enqueuer_regression_test.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// 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.
-
-// Regression test for 'staged' reflection.  MirrorsUsed pulls in static
-// functions, that pulls in more reflection.  This used to trigger a bug in
-// Enqueuer where the second set of pulled in definitions were unresolved.
-
-@MirrorsUsed(targets: const ["foo"])
-import 'dart:mirrors';
-
-final foo = reflect(reflect(9)).getField(#getField);
-
-void main() {}