staging: r8188eu: remove duplicate category check

The caller of on_action_public has already checked the action category. We
can remove the check in on_action_public.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20221030173326.1588647-3-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_mlme_ext.c

@@ -3819,16 +3819,12 @@ unsigned int on_action_public(struct adapter *padapter, struct recv_frame *precv
 	unsigned int ret = _FAIL;
 	u8 *pframe = precv_frame->rx_data;
 	u8 *frame_body = pframe + sizeof(struct ieee80211_hdr_3addr);
-	u8 category, action;
+	u8 action;
 
 	/* check RA matches or not */
 	if (memcmp(myid(&padapter->eeprompriv), mgmt->da, ETH_ALEN))
 		goto exit;
 
-	category = frame_body[0];
-	if (category != WLAN_CATEGORY_PUBLIC)
-		goto exit;
-
 	action = frame_body[1];
 	switch (action) {
 	case ACT_PUBLIC_VENDOR: