netfilter: get rid of useless debugging from core

This patch remove compile time code to catch inconventional verdicts.
We have better ways to handle this case these days, eg. pr_debug() but
even though I don't think this is useful at all, so let's remove this.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/core.c

@@ -323,15 +323,6 @@ unsigned int nf_iterate(struct sk_buff *skb,
 repeat:
 		verdict = (*entryp)->ops.hook((*entryp)->ops.priv, skb, state);
 		if (verdict != NF_ACCEPT) {
-#ifdef CONFIG_NETFILTER_DEBUG
-			if (unlikely((verdict & NF_VERDICT_MASK)
-							> NF_MAX_VERDICT)) {
-				NFDEBUG("Evil return from %p(%u).\n",
-					(*entryp)->ops.hook, state->hook);
-				*entryp = rcu_dereference((*entryp)->next);
-				continue;
-			}
-#endif
 			if (verdict != NF_REPEAT)
 				return verdict;
 			goto repeat;