iwlwifi: mvm: fix irrelevant comment

This code moved and is now far away from the code that takes
the mutex.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index f297690..795f65c 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -639,8 +639,7 @@
 		 * By now, all the AC queues are empty. The AGG queues are
 		 * empty too. We already got all the Tx responses for all the
 		 * packets in the queues. The drain work can have been
-		 * triggered. Flush it. This work item takes the mutex, so kill
-		 * it before we take it.
+		 * triggered. Flush it.
 		 */
 		flush_work(&mvm->sta_drained_wk);
 	}