staging: rtl8188eu: remove some ieee80211 constants from wifi.h

The constants IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL and
IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA are not used in the driver
code and, if ever needed, available from 'include/linux/ieee80211.h'.
Remove them from wifi.h.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200629171405.7711-1-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/wifi.h

@@ -453,10 +453,6 @@ static inline int IsFrameTypeCtrl(unsigned char *pframe)
 				Below is the definition for 802.11n
 ------------------------------------------------------------------------------*/
 
-/* 802.11 BAR control masks */
-#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
-#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
-
 /**
  * struct rtw_ieee80211_ht_cap - HT additional information
  *