Staging: ccree: Remove unused variable monitor_lock

Remove the variable monitor_lock as it is not used anywhere.
Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ccree/ssi_request_mgr.c

@@ -49,7 +49,6 @@ struct ssi_request_mgr_handle {
 	dma_addr_t dummy_comp_buff_dma;
 	struct cc_hw_desc monitor_desc;
 
-	volatile unsigned long monitor_lock;
 #ifdef COMP_IN_WQ
 	struct workqueue_struct *workq;
 	struct delayed_work compwork;