staging: r8188eu: remove unused members of struct _io_ops

Remove function pointers which are not used by the r8188eu driver.

Acked-by: Michael Straube <straube.linux@gmail.com>
Acked-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210821164859.4351-9-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/rtw_io.h

@@ -100,13 +100,10 @@ struct _io_ops {
 			  u8 *pmem);
 	void (*_write_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
 			   u8 *pmem);
-	void (*_sync_irp_protocol_rw)(struct io_queue *pio_q);
-	u32 (*_read_interrupt)(struct intf_hdl *pintfhdl, u32 addr);
 	u32 (*_read_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
 			  u8 *pmem);
 	u32 (*_write_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
 			   u8 *pmem);
-	u32 (*_write_scsi)(struct intf_hdl *pintfhdl,u32 cnt, u8 *pmem);
 	void (*_read_port_cancel)(struct intf_hdl *pintfhdl);
 	void (*_write_port_cancel)(struct intf_hdl *pintfhdl);
 };