USB: gadget: f_mass_storage: remove needless complete()

This commit removes call to the complete() function done in
fsg_unbind() which was never needed there but was a leftover
form file_storage.c.

Signed-off-by: Michal Nazarewicz <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/gadget/f_mass_storage.c

···
 		up_write(&common->filesem);
 	}
 
-	/* Let the unbind and cleanup routines know the thread has exited */
+	/* Let fsg_unbind() know the thread has exited */
 	complete_and_exit(&common->thread_notifier, 0);
 }
 
···
 	if (common->state != FSG_STATE_TERMINATED) {
 		raise_exception(common, FSG_STATE_EXIT);
 		wait_for_completion(&common->thread_notifier);
-
-		/* The cleanup routine waits for this completion also */
-		complete(&common->thread_notifier);
 	}
 
 	if (likely(common->luns)) {