staging: r8188eu: remove c2h_id_filter_ccx from struct hal_ops

Remove c2h_id_filter_ccx function pointer from struct hal_ops, as it
is unused.
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210906010106.898-15-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/hal_intf.h

@@ -232,7 +232,6 @@ struct hal_ops {
 				  u32 bndy_cnt);
 
 	void (*hal_notch_filter)(struct adapter *adapter, bool enable);
-	c2h_id_filter c2h_id_filter_ccx;
 };
 
 #define RF_CHANGE_BY_INIT	0