netfilter: nf_tables: remove double return statement

Signed-off-by: NAaron Conole <aconole@bytheb.org>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_tables_api.c

@@ -4433,8 +4433,6 @@ static int nf_tables_getobj(struct net *net, struct sock *nlsk,
 err:
 	kfree_skb(skb2);
 	return err;
-
-	return 0;
 }
 
 static void nft_obj_destroy(struct nft_object *obj)