staging: rtl8188eu: remove unused should_forbid_n_rate()

The function should_forbid_n_rate() is never used, so remove it.
Discovered by cppcheck.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_wlan_util.c

@@ -1094,41 +1094,6 @@ unsigned int is_ap_in_tkip(struct adapter *padapter)
 	}
 }
 
-unsigned int should_forbid_n_rate(struct adapter *padapter)
-{
-	u32 i;
-	struct ndis_802_11_var_ie *pIE;
-	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
-	struct wlan_bssid_ex  *cur_network = &pmlmepriv->cur_network.network;
-
-	if (rtw_get_capability((struct wlan_bssid_ex *)cur_network) & WLAN_CAPABILITY_PRIVACY) {
-		for (i = sizeof(struct ndis_802_11_fixed_ie); i < cur_network->ie_length;) {
-			pIE = (struct ndis_802_11_var_ie *)(cur_network->ies + i);
-
-			switch (pIE->ElementID) {
-			case _VENDOR_SPECIFIC_IE_:
-				if (!memcmp(pIE->data, RTW_WPA_OUI, 4) &&
-				    ((!memcmp((pIE->data + 12), WPA_CIPHER_SUITE_CCMP, 4)) ||
-				    (!memcmp((pIE->data + 16), WPA_CIPHER_SUITE_CCMP, 4))))
-					return false;
-				break;
-			case _RSN_IE_2_:
-				if  ((!memcmp((pIE->data + 8), RSN_CIPHER_SUITE_CCMP, 4))  ||
-				       (!memcmp((pIE->data + 12), RSN_CIPHER_SUITE_CCMP, 4)))
-					return false;
-			default:
-				break;
-			}
-
-			i += (pIE->Length + 2);
-		}
-
-		return true;
-	} else {
-		return false;
-	}
-}
-
 unsigned int is_ap_in_wep(struct adapter *padapter)
 {
 	u32 i;

drivers/staging/rtl8188eu/include/rtw_mlme_ext.h

@@ -534,7 +534,6 @@ unsigned char get_highest_rate_idx(u32 mask);
 int support_short_GI(struct adapter *padapter, struct ieee80211_ht_cap *caps);
 unsigned int is_ap_in_tkip(struct adapter *padapter);
 unsigned int is_ap_in_wep(struct adapter *padapter);
-unsigned int should_forbid_n_rate(struct adapter *padapter);
 
 void report_join_res(struct adapter *padapter, int res);
 void report_survey_event(struct adapter *padapter,