rtlwifi: remove useless code

Remove useless local variables last_read_point and last_txw_point and
the code related.
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c

@@ -478,7 +478,6 @@ u16 rtl92ee_rx_desc_buff_remained_cnt(struct ieee80211_hw *hw, u8 queue_index)
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	u16 read_point = 0, write_point = 0, remind_cnt = 0;
 	u32 tmp_4byte = 0;
-	static u16 last_read_point;
 	static bool start_rx;
 
 	tmp_4byte = rtl_read_dword(rtlpriv, REG_RXQ_TXBD_IDX);
@@ -506,7 +505,6 @@ u16 rtl92ee_rx_desc_buff_remained_cnt(struct ieee80211_hw *hw, u8 queue_index)
 
 	rtlpci->rx_ring[queue_index].next_rx_rp = write_point;
 
-	last_read_point = read_point;
 	return remind_cnt;
 }
 
@@ -917,7 +915,6 @@ void rtl92ee_set_desc(struct ieee80211_hw *hw, u8 *pdesc, bool istx,
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	u16 cur_tx_rp = 0;
 	u16 cur_tx_wp = 0;
-	static u16 last_txw_point;
 	static bool over_run;
 	u32 tmp = 0;
 	u8 q_idx = *val;
@@ -951,9 +948,6 @@ void rtl92ee_set_desc(struct ieee80211_hw *hw, u8 *pdesc, bool istx,
 				rtl_write_word(rtlpriv,
 					       get_desc_addr_fr_q_idx(q_idx),
 					       ring->cur_tx_wp);
-
-				if (q_idx == 1)
-					last_txw_point = cur_tx_wp;
 			}
 
 			if (ring->avl_desc < (max_tx_desc - 15)) {