Revert "mac80211: Add TXQ scheduling API"

This reverts commit e937b8da5a.

Turns out that a new driver (mt76) is coming in through
Kalle's tree, and will conflict with this. It also has some
conflicting requirements, so we'll revisit this later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/main.c

@@ -619,9 +619,6 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 	spin_lock_init(&local->rx_path_lock);
 	spin_lock_init(&local->queue_stop_reason_lock);
 
-	INIT_LIST_HEAD(&local->active_txqs);
-	spin_lock_init(&local->active_txq_lock);
-
 	INIT_LIST_HEAD(&local->chanctx_list);
 	mutex_init(&local->chanctx_mtx);