Cleanup: remove write-only variable "hostname" in NetworkGameList

src/network/core/game_info.h

@@ -74,7 +74,6 @@ struct NetworkGameInfo : NetworkServerGameInfo {
 	uint16 map_width;                               ///< Map width
 	uint16 map_height;                              ///< Map height
 	char server_name[NETWORK_NAME_LENGTH];          ///< Server name
-	char hostname[NETWORK_HOSTNAME_LENGTH];         ///< Hostname of the server (if any)
 	char server_revision[NETWORK_REVISION_LENGTH];  ///< The version number the server is using (e.g.: 'r304' or 0.5.0)
 	bool dedicated;                                 ///< Is this a dedicated server?
 	bool version_compatible;                        ///< Can we connect to this server or not? (based on server_revision)

src/network/network_gamelist.cpp

@@ -51,7 +51,6 @@ static void NetworkGameListHandleDelayedInsert()
 				ClearGRFConfigList(&item->info.grfconfig);
 				memset(&item->info, 0, sizeof(item->info));
 				strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
-				strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
 				item->online = false;
 			}
 			item->manually |= ins_item->manually;

src/network/network_udp.cpp

@@ -92,7 +92,6 @@ static void DoNetworkUDPQueryServer(NetworkAddress &address, bool needs_mutex, b
 	/* Clear item in gamelist */
 	NetworkGameList *item = CallocT<NetworkGameList>(1);
 	address.GetAddressAsString(item->info.server_name, lastof(item->info.server_name));
-	strecpy(item->info.hostname, address.GetHostname(), lastof(item->info.hostname));
 	item->address = address;
 	item->manually = manually;
 	NetworkGameListAddItemDelayed(item);
@@ -365,10 +364,6 @@ void ClientNetworkUDPSocketHandler::Receive_SERVER_RESPONSE(Packet *p, NetworkAd
 		}
 	}
 
-	if (item->info.hostname[0] == '\0') {
-		seprintf(item->info.hostname, lastof(item->info.hostname), "%s", client_addr->GetHostname());
-	}
-
 	if (client_addr->GetAddress()->ss_family == AF_INET6) {
 		strecat(item->info.server_name, " (IPv6)", lastof(item->info.server_name));
 	}