remove logging using logger at exit

Summary:
Pull Request resolved: https://github.com/facebookresearch/d2go/pull/628

At the exit, file descriptor in the logger for info level logging has already been closed. Calling **logger.info()** will raise an exception. Thus, we remove it.

Reviewed By: ayushidalmia, wat3rBro

Differential Revision: D50488097

fbshipit-source-id: 42b568e2e29d837424c3b2e42a5a33c067651ec3

d2go/data/utils.py

@@ -73,7 +73,6 @@ class AdhocDatasetManager:
     @atexit.register
     def _atexit():
         for ds in AdhocDatasetManager._REGISTERED.values():
-            logger.info("Remove remaining adhoc dataset: {}".format(ds.new_ds_name))
             ds.cleanup()