Fixes extra 'file' that was leftover locally after import

cms/djangoapps/contentstore/views/import_export.py

@@ -60,7 +60,7 @@ def import_course(request, org, course, name):
         `filename` is truncted on creation. Additionally removes dirname on
         exit.
         """
-        open("file", "w").close()
+        open(filename, "w").close()
         try:
             yield filename
         finally: