staging: rtl8188eu: Removed code valid for 5GHz

This patch removes support for channels > 14. That is from the TODO which
says:

	-find and remove remaining code valid only for 5HGz. Most of
	obvious ones have been removed, but things like channel > 14 still
	exist.
Signed-off-by: Bhaskar Singh <bhaskar.kernel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_ieee80211.c

@@ -100,19 +100,13 @@ bool rtw_is_cckratesonly_included(u8 *rate)
 
 int rtw_check_network_type(unsigned char *rate, int ratelen, int channel)
 {
-	if (channel > 14) {
-		if (rtw_is_cckrates_included(rate))
-			return WIRELESS_INVALID;
-		else
-			return WIRELESS_11A;
-	} else {  /*  could be pure B, pure G, or B/G */
-		if (rtw_is_cckratesonly_included(rate))
-			return WIRELESS_11B;
-		else if (rtw_is_cckrates_included(rate))
-			return	WIRELESS_11BG;
-		else
-			return WIRELESS_11G;
-	}
+	/*  could be pure B, pure G, or B/G */
+	if (rtw_is_cckratesonly_included(rate))
+		return WIRELESS_11B;
+	else if (rtw_is_cckrates_included(rate))
+		return	WIRELESS_11BG;
+	else
+		return WIRELESS_11G;
 }
 
 u8 *rtw_set_fixed_ie(void *pbuf, unsigned int len, void *source,