tcp: Remove hashinfo test for inet6?_lookup_run_sk_lookup().

tcp: Remove hashinfo test for inet6?_lookup_run_sk_lookup().

Commit 6c886db2e78c ("net: remove duplicate sk_lookup helpers")
started to check if hashinfo == net->ipv4.tcp_death_row.hashinfo
in __inet_lookup_listener() and inet6_lookup_listener() and
stopped invoking BPF sk_lookup prog for DCCP.

DCCP has gone and the condition is always true.

Let's remove the hashinfo test.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250822190803.540788-4-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>