Wrapping files without library tags is neither necessary nor correct anymore.

dart/tests/lib/lib.status

Index: dart/tests/lib/lib.status
diff --git a/dart/tests/lib/lib.status b/dart/tests/lib/lib.status
index d52bdcbc9231754fdb1fae36579aebaef7d6da2f..00a3fc5f3a13fdce55c6bec87937f09f9f27586f 100644
--- a/dart/tests/lib/lib.status
+++ b/dart/tests/lib/lib.status
@@ -90,7 +90,6 @@ async/run_async3_test: Fail # _enqueueImmediate runs after Timer. http://dartbug
 async/run_async4_test: Pass, Fail # http://dartbug.com/9013
 
 [ $compiler == none && $runtime == drt ]
-async/deferred/deferred_api_test: Fail # http://dartbug.com/2264
 async/timer_isolate_test: Skip # See Issue 4997
 async/timer_not_available_test: Skip # only meant to test when there is no way to
                                      # implement timer (currently only in d8)