ath10k: remove unused <linux/semaphore.h>

<linux/semaphore.h> is not used anymore, so just remove the include.
Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/htc.h

@@ -22,7 +22,6 @@
 #include <linux/list.h>
 #include <linux/bug.h>
 #include <linux/skbuff.h>
-#include <linux/semaphore.h>
 #include <linux/timer.h>
 
 struct ath10k;