staging: wilc1000: remove unnecessary files

This patch removes the following files which are not used anymore.
	- fifo_buffer.c
	- fifo_buffer.h
	- coreconfigsimulator.h
	- wilc_wfi_netdevice.c

Signed-off-by: Robin Hwang <robin.hwang@atmel.com>
Signed-off-by: Tony Cho <tony.cho@atmel.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/wilc1000/Makefile b/drivers/staging/wilc1000/Makefile
index a78c4d5..5ca8fa2 100644
--- a/drivers/staging/wilc1000/Makefile
+++ b/drivers/staging/wilc1000/Makefile
@@ -25,10 +25,10 @@
 ccflags-$(CONFIG_WILC1000_DYNAMICALLY_ALLOCATE_MEMROY) += -DWILC_NORMAL_ALLOC
 
 
-wilc1000-objs := wilc_wfi_netdevice.o wilc_wfi_cfgoperations.o linux_wlan.o linux_mon.o \
+wilc1000-objs := wilc_wfi_cfgoperations.o linux_wlan.o linux_mon.o \
 			wilc_memory.o wilc_msgqueue.o wilc_sleep.o wilc_strutils.o \
 			wilc_timer.o coreconfigurator.o host_interface.o \
-			fifo_buffer.o wilc_sdio.o wilc_spi.o wilc_wlan_cfg.o wilc_debugfs.o
+			wilc_sdio.o wilc_spi.o wilc_wlan_cfg.o wilc_debugfs.o
 
 wilc1000-$(CONFIG_WILC1000_SDIO) += linux_wlan_sdio.o
 wilc1000-$(CONFIG_WILC1000_SPI) += linux_wlan_spi.o