net/ulp: Remove redundant ->clone() test in inet_clone_ulp().

Commit 2c02d41d ("net/ulp: prevent ULP without clone op from entering
the LISTEN status") guarantees that all ULP listeners have clone() op, so
we no longer need to test it in inet_clone_ulp().
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230217200920.85306-1-kuniyu@amazon.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/ipv4/inet_connection_sock.c

@@ -1122,8 +1122,7 @@ static void inet_clone_ulp(const struct request_sock *req, struct sock *newsk,
 	if (!icsk->icsk_ulp_ops)
 		return;
 
-	if (icsk->icsk_ulp_ops->clone)
-		icsk->icsk_ulp_ops->clone(req, newsk, priority);
+	icsk->icsk_ulp_ops->clone(req, newsk, priority);
 }
 
 /**