net_node: remove dead seed nodes

src/p2p/net_node.inl

@@ -604,16 +604,12 @@ namespace nodetool
     if (nettype == cryptonote::TESTNET)
     {
       full_addrs.insert("212.83.175.67:28080");
-      full_addrs.insert("5.9.100.248:28080");
-      full_addrs.insert("163.172.182.165:28080");
-      full_addrs.insert("195.154.123.123:28080");
       full_addrs.insert("212.83.172.165:28080");
       full_addrs.insert("192.110.160.146:28080");
     }
     else if (nettype == cryptonote::STAGENET)
     {
       full_addrs.insert("162.210.173.150:38080");
-      full_addrs.insert("162.210.173.151:38080");
       full_addrs.insert("192.110.160.146:38080");
     }
     else if (nettype == cryptonote::FAKECHAIN)
@@ -621,13 +617,7 @@ namespace nodetool
     }
     else
     {
-      full_addrs.insert("107.152.130.98:18080");
       full_addrs.insert("212.83.175.67:18080");
-      full_addrs.insert("5.9.100.248:18080");
-      full_addrs.insert("163.172.182.165:18080");
-      full_addrs.insert("161.67.132.39:18080");
-      full_addrs.insert("198.74.231.92:18080");
-      full_addrs.insert("195.154.123.123:18080");
       full_addrs.insert("212.83.172.165:18080");
       full_addrs.insert("192.110.160.146:18080");
       full_addrs.insert("88.198.163.90:18080");