libertas: remove unnecessary check before calling debugfs_remove

Debugfs_remove will check for error or NULL for us, so it is not
necessary to do this here.
Signed-off-by: Bas Peters <baspeters93@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/libertas/debugfs.c

@@ -742,7 +742,6 @@ void lbs_debugfs_init(void)
 
 void lbs_debugfs_remove(void)
 {
-	if (lbs_dir)
 	debugfs_remove(lbs_dir);
 }