staging: wilc1000: remove unused function pointer io_deinit

This patch removes function pointer io_deinit which is never used, and delete
it's related codes also.
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_wlan.c

@@ -892,10 +892,8 @@ void linux_to_wlan(wilc_wlan_inp_t *nwi, struct wilc *nic)
 
 #ifdef WILC_SDIO
 	nwi->io_func.io_type = HIF_SDIO;
-	nwi->io_func.io_deinit = linux_sdio_deinit;
 #else
 	nwi->io_func.io_type = HIF_SPI;
-	nwi->io_func.io_deinit = linux_spi_deinit;
 #endif
 }
 

drivers/staging/wilc1000/wilc_wlan_if.h

@@ -74,7 +74,6 @@ typedef struct {
 
 typedef struct {
 	int io_type;
-	void (*io_deinit)(void *);
 } wilc_wlan_io_func_t;
 
 #define WILC_MAC_INDICATE_STATUS	0x1