Remove the tracking of the last user handler clean.

The information isn't used, and the method is never actually called.

src/server/server.cpp

@@ -259,9 +259,7 @@ server::server(int port,
 	, join_lobby_response_("[join_lobby]\n[/join_lobby]\n", simple_wml::INIT_COMPRESSED)
 	, games_and_users_list_("[gamelist]\n[/gamelist]\n", simple_wml::INIT_STATIC)
 	, metrics_()
-	, last_ping_(std::time(nullptr))
 	, dump_stats_timer_(io_service_)
-	, last_uh_clean_(last_ping_)
 	, cmd_handlers_()
 	, timer_(io_service_)
 	, lan_server_timer_(io_service_)
@@ -576,15 +574,6 @@ void server::dump_stats(const boost::system::error_code& ec)
 	start_dump_stats();
 }
 
-void server::clean_user_handler(const std::time_t& now)
-{
-	if(!user_handler_) {
-		return;
-	}
-
-	last_uh_clean_ = now;
-}
-
 void server::handle_new_client(socket_ptr socket)
 {
 	async_send_doc(socket, version_query_response_, std::bind(&server::handle_version, this, _1));

src/server/server.hpp

@@ -170,14 +170,10 @@ class server : public server_base
 
 	metrics metrics_;
 
-	std::time_t last_ping_;
 	boost::asio::steady_timer dump_stats_timer_;
 	void start_dump_stats();
 	void dump_stats(const boost::system::error_code& ec);
 
-	std::time_t last_uh_clean_;
-	void clean_user_handler(const std::time_t& now);
-
 	/** Process commands from admins and users. */
 	std::string process_command(std::string cmd, std::string issuer_name);