staging:r8188eu: remove rtw_handle_dualmac declaration

It is a declaration of the non-existent function.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/drv_types.h

@@ -177,8 +177,6 @@ struct adapter {
 
 #define adapter_to_dvobj(adapter) (adapter->dvobj)
 
-int rtw_handle_dualmac(struct adapter *adapter, bool init);
-
 static inline u8 *myid(struct eeprom_priv *peepriv)
 {
 	return peepriv->mac_addr;