staging: wilc1000: remove unused files

This patch removes linux_wlan_spi.[ch] which are not used anymore.
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/Makefile

@@ -17,4 +17,4 @@ obj-$(CONFIG_WILC1000_SDIO) += wilc1000-sdio.o
 wilc1000-sdio-objs += wilc_sdio.o
 
 obj-$(CONFIG_WILC1000_SPI) += wilc1000-spi.o
-wilc1000-spi-objs += linux_wlan_spi.o wilc_spi.o
+wilc1000-spi-objs += wilc_spi.o

drivers/staging/wilc1000/linux_wlan_spi.c

-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/cdev.h>
-#include <linux/uaccess.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/of_gpio.h>
-
-#include "linux_wlan_spi.h"
-#include "wilc_wfi_netdevice.h"
-#include "linux_wlan_common.h"
-#include "wilc_wlan_if.h"

drivers/staging/wilc1000/linux_wlan_spi.h

-#ifndef LINUX_WLAN_SPI_H
-#define LINUX_WLAN_SPI_H
-
-#include <linux/spi/spi.h>
-#include "wilc_wfi_netdevice.h"
-#endif