Revert "ipv6: Fix handling of LLA with VRF and sockets bound to VRF"

This reverts commit 2b3541ff.

This patch shouldn't have been backported to 4.19.
Signed-off-by: Sasha Levin <sashal@kernel.org>

net/ipv6/tcp_ipv6.c

@@ -734,7 +734,6 @@ static void tcp_v6_init_req(struct request_sock *req,
 			    const struct sock *sk_listener,
 			    struct sk_buff *skb)
 {
-	bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);
 	struct inet_request_sock *ireq = inet_rsk(req);
 	const struct ipv6_pinfo *np = inet6_sk(sk_listener);
 
@@ -742,7 +741,7 @@ static void tcp_v6_init_req(struct request_sock *req,
 	ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
 
 	/* So that link locals have meaning */
-	if ((!sk_listener->sk_bound_dev_if || l3_slave) &&
+	if (!sk_listener->sk_bound_dev_if &&
 	    ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
 		ireq->ir_iif = tcp_v6_iif(skb);