In the original commit 15fae3410f1d ("mac80211: notify driver on
mgd TX completion") I evidently made a mistake and placed the
call in the "associated" if, rather than the "assoc_data". Later
I noticed the missing call and placed it in commit c042600c17d8
("wifi: mac80211: adding missing drv_mgd_complete_tx() call"),
but didn't remove the wrong one. Remove it now.