crypto: chtls - remove cdev_list_lock

Last user of cdev_list_lock was removed in commit

  6422ccc5 ("crypto/chelsio/chtls: listen fails with multiadapt")

Cc: Atul Gupta <atul.gupta@chelsio.com>
Cc: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/chelsio/chtls/chtls_main.c

@@ -30,7 +30,6 @@
  */
 static LIST_HEAD(cdev_list);
 static DEFINE_MUTEX(cdev_mutex);
-static DEFINE_MUTEX(cdev_list_lock);
 
 static DEFINE_MUTEX(notify_mutex);
 static RAW_NOTIFIER_HEAD(listen_notify_list);