Fix: error priority in bird.conf

lib/util.conf

@@ -1,35 +0,0 @@
-include "./constant.conf";
-
-function pub_is_invalid_net_length(){
-    case net.type {
-        NET_IP4: return net.len > 24;
-        NET_IP6: return net.len > 48;
-        else: print "pub_is_valid_net_length: unexpected net.type ", net.type, " ", net; return false;
-    }
-}
-
-function is_bogon_prefix() {
-    case net.type {
-        NET_IP4: return net ~ BOGON_PREFIXES_V4;
-        NET_IP6: return net ~ BOGON_PREFIXES_V6;
-        else: print "is_bogon_prefix: unexpected net.type ", net.type, " ", net; return false;
-    }
-}
-
-function is_bogon_asn() {
-    if bgp_path ~ BOGON_ASNS then return true;
-    return false;
-}
-
-function is_downstream_asn() {
-    if bgp_path.last ~ DOWNSTREAM_ASN then return true;
-    return false;
-}
-
-function is_valid() {
-    if pub_is_invalid_net_length() then return false;
-    if is_bogon_prefix() then return false;
-    if is_bogon_asn() then return false;
-    if is_rpki_invalid() then return false;
-    return true;
-}