dpif-netdev: Remove useless port checking.

Since commit ff073a7 ("dpif-netdev: Use hmap instead of
list+array for tracking ports."), 'is_valid_port_number()' is
equal to 'port_no != ODPP_NONE', and the expression below will
never be true.

Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Greg Rose <gvrose8192@gmail.com>

lib/dpif-netdev.c

@@ -2254,8 +2254,6 @@ static int
 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
                               struct flow *flow, bool probe)
 {
-    odp_port_t in_port;
-
     if (odp_flow_key_to_flow(key, key_len, flow)) {
         if (!probe) {
             /* This should not happen: it indicates that
@@ -2277,11 +2275,6 @@ dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
         return EINVAL;
     }
 
-    in_port = flow->in_port.odp_port;
-    if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
-        return EINVAL;
-    }
-
     if (flow->ct_state & DP_NETDEV_CS_UNSUPPORTED_MASK) {
         return EINVAL;
     }