staging: r8188eu: remove unused frametag defines

Remove some frametag defines which are not used in the r8188eu driver.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230207192319.294203-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/rtw_xmit.h

@@ -152,14 +152,7 @@ struct pkt_attrib {
 
 #define NULL_FRAMETAG		(0x0)
 #define DATA_FRAMETAG		0x01
-#define L2_FRAMETAG		0x02
 #define MGNT_FRAMETAG		0x03
-#define AMSDU_FRAMETAG	0x04
-
-#define EII_FRAMETAG		0x05
-#define IEEE8023_FRAMETAG  0x06
-
-#define MP_FRAMETAG		0x07
 
 #define TXAGG_FRAMETAG	0x08