Bye to some useless stuff

commands/single/hello-world.js

@@ -1,17 +0,0 @@
-const { Command } = require('discord.js-commando');
-
-module.exports = class HelloWorldCommand extends Command {
-	constructor(client) {
-		super(client, {
-			name: 'hello-world',
-			aliases: ['hola-mundo'],
-			group: 'single',
-			memberName: 'hello-world',
-			description: 'Hello world.'
-		});
-	}
-
-	run(msg) {
-		return msg.say('Hello World!');
-	}
-};