staging: r8188eu: remove rtw_set_ie_ch_switch function

Driver does not use this function.
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_ieee80211.c

@@ -155,17 +155,6 @@ u8 *rtw_set_ie
 	return pbuf + len + 2;
 }
 
-inline u8 *rtw_set_ie_ch_switch(u8 *buf, u32 *buf_len, u8 ch_switch_mode,
-	u8 new_ch, u8 ch_switch_cnt)
-{
-	u8 ie_data[3];
-
-	ie_data[0] = ch_switch_mode;
-	ie_data[1] = new_ch;
-	ie_data[2] = ch_switch_cnt;
-	return rtw_set_ie(buf, WLAN_EID_CHANNEL_SWITCH,  3, ie_data, buf_len);
-}
-
 /*----------------------------------------------------------------------------
 index: the information element id index, limit is the limit for search
 -----------------------------------------------------------------------------*/

drivers/staging/rtl8188eu/include/ieee80211.h

@@ -1096,8 +1096,6 @@ enum secondary_ch_offset {
 	SCA = 1, /* secondary channel above */
 	SCB = 3,  /* secondary channel below */
 };
-u8 *rtw_set_ie_ch_switch(u8 *buf, u32 *buf_len, u8 ch_switch_mode,
-			 u8 new_ch, u8 ch_switch_cnt);
 
 u8 *rtw_get_ie(u8 *pbuf, int index, int *len, int limit);