staging: pohmelfs: Remove NULL check before kfree

This patch was generated by the following semantic patch:
// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);

@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/pohmelfs/config.c

@@ -601,11 +601,9 @@ void pohmelfs_config_exit(void)
 
 		list_del(&g->group_entry);
 
-		if (g->hash_string)
-			kfree(g->hash_string);
+		kfree(g->hash_string);
 
-		if (g->cipher_string)
-			kfree(g->cipher_string);
+		kfree(g->cipher_string);
 
 		kfree(g);
 	}