wifi: plfxlc: Drop unused include

The driver includes the legacy GPIO header <linux/gpio.h>
but does not use any symbols from it. Drop the include.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240131-descriptors-wireless-v1-5-e1c7c5d68746@linaro.org

drivers/net/wireless/purelifi/plfxlc/mac.c

@@ -7,7 +7,6 @@
 #include <linux/etherdevice.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
-#include <linux/gpio.h>
 #include <linux/jiffies.h>
 #include <net/ieee80211_radiotap.h>