Add a cleanup method stub on the game manager

server/src/objects/GameDB.ts

@@ -22,6 +22,15 @@ export class GameDB {
 		this.games[game.id] = game;
 	};
 
+	/**
+	 * This removes all inactive games from the system, this includes any games
+	 * that do not have any currently connected players and are in the lobby
+	 * state. This will not remove any games that are currently in-progress so
+	 * that players can resume the game later if they happened to all get
+	 * disconnected for some reason.
+	 */
+	public cleanup(): void {};
+
 	/** Returns a count of how many games currently exist in the database */
 	public get count() {
 		return Object.keys(this.games).length;