rtlwifi: remove CONNECTION_MONITOR flag

To use keep-alive mechanism in mac80211 stack, since driver supports
reporting accurate nullfunc frame tx ack now.
Signed-off-by: NTzu-En Huang <tehuang@realtek.com>
Signed-off-by: NPing-Ke Shih <pkshih@realtek.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -396,7 +396,6 @@ static void _rtl_init_mac80211(struct ieee80211_hw *hw)
 	ieee80211_hw_set(hw, SIGNAL_DBM);
 	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
-	ieee80211_hw_set(hw, CONNECTION_MONITOR);
 	ieee80211_hw_set(hw, MFP_CAPABLE);
 	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);