const { Command } = require('@sapphire/framework');
class PingCommand extends Command {
  constructor(context, options) {
    super(context, { ...options });
  }
  registerApplicationCommands(registry) {
    registry.registerChatInputCommand((builder) =>
      builder.setName('ping').setDescription('Ping bot to see if it is alive')
    );
  }
}
module.exports = {
  PingCommand
};

 client.application.commands.fetch('123456789012345678') // id of your command
      .then( (command) => {
    console.log(`Fetched command ${command.name}`)
    // further delete it like so:
    command.delete()
    console.log(`Deleted command ${command.name}`)
    }).catch(console.error);