net: remove duplicate INDIRECT_CALLABLE_DECLARE of udp[6]_ehashfn

There are already INDIRECT_CALLABLE_DECLARE in the hashtable
headers, no need to declare them again.

Fixes: 0f495f76 ("net: remove duplicate reuseport_lookup functions")
Suggested-by: Martin Lau <martin.lau@linux.dev>
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230731-indir-call-v1-1-4cd0aeaee64f@isovalent.comSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

net/ipv4/inet_hashtables.c

@@ -333,8 +333,6 @@ static inline int compute_score(struct sock *sk, struct net *net,
 	return score;
 }
 
-INDIRECT_CALLABLE_DECLARE(inet_ehashfn_t udp_ehashfn);
-
 /**
  * inet_lookup_reuseport() - execute reuseport logic on AF_INET socket if necessary.
  * @net: network namespace.

net/ipv6/inet6_hashtables.c

@@ -112,8 +112,6 @@ static inline int compute_score(struct sock *sk, struct net *net,
 	return score;
 }
 
-INDIRECT_CALLABLE_DECLARE(inet6_ehashfn_t udp6_ehashfn);
-
 /**
  * inet6_lookup_reuseport() - execute reuseport logic on AF_INET6 socket if necessary.
  * @net: network namespace.