staging: rtl8188eu: remove unused enum P2P_PROTO_WK_ID

Enumeration P2P_PROTO_WK_ID is not used in the driver code,
so remove it from wifi.h.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/wifi.h

@@ -793,16 +793,6 @@ enum ht_cap_ampdu_factor {
 
 #define	P2P_PRIVATE_IOCTL_SET_LEN		64
 
-enum P2P_PROTO_WK_ID {
-	P2P_FIND_PHASE_WK = 0,
-	P2P_RESTORE_STATE_WK = 1,
-	P2P_PRE_TX_PROVDISC_PROCESS_WK = 2,
-	P2P_PRE_TX_NEGOREQ_PROCESS_WK = 3,
-	P2P_PRE_TX_INVITEREQ_PROCESS_WK = 4,
-	P2P_AP_P2P_CH_SWITCH_PROCESS_WK = 5,
-	P2P_RO_CH_WK = 6,
-};
-
 /*	=====================WFD Section===================== */
 /*	For Wi-Fi Display */
 #define	WFD_ATTR_DEVICE_INFO		0x00