Deleting single channel/all channels does not work

Question

I'm creating a bot that manages a server to get used to JavaScript and the Discord.js library. I tried deleting a channel using this code, but it didn't work.

guild.channel.delete('Making room for new channels')
  .then(deleted => console.log(`Deleted ${deleted.name} to make room for new channels`))
  .catch(console.error);

I've already tried to replace the first line with channel.delete and channel.guild.delete, but I kind of gave up since I have no clue on how to make it delete every channel in the guild.
As bad as this sounds, I'm not trying to destroy any discord server.
Thanks in advance.