[NET]: #if 0 out net_alloc() for now.

We will undo this once it is actually used.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/net_namespace.c

@@ -32,10 +32,12 @@ void net_unlock(void)
 	mutex_unlock(&net_list_mutex);
 }
 
+#if 0
 static struct net *net_alloc(void)
 {
 	return kmem_cache_alloc(net_cachep, GFP_KERNEL);
 }
+#endif
 
 static void net_free(struct net *net)
 {