greybus: es1: no need to check for NULL on debugfs_remove()

The function can, and even expects NULL, so don't check.

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/es1.c b/drivers/staging/greybus/es1.c
index cce3155..723d8b7 100644
--- a/drivers/staging/greybus/es1.c
+++ b/drivers/staging/greybus/es1.c
@@ -558,10 +558,8 @@
 							gb_debugfs_get(), NULL,
 							&apb1_log_fops);
 	} else {
-		if (apb1_log_dentry) {
-			debugfs_remove(apb1_log_dentry);
-			apb1_log_dentry = NULL;
-		}
+		debugfs_remove(apb1_log_dentry);
+		apb1_log_dentry = NULL;
 
 		if (apb1_log_task) {
 			kthread_stop(apb1_log_task);