Update Command Permissions to v2

[KNOXDEV]

Discord did the wonderful good deed of completely replacing their old command permission API overnight with no warning less than 48 hours before the SDCTF dry run.

Check out this thread of very angry people for more information: discord/discord-api-docs#4830 (review)

I've removed the code responsible for setting command permissions. This is fine, by default, the permissions are NONE, so there's no security issues, but there is now an additional 5 minute burden of having to manually give CTF Admin permission to use the admin commands and the same for the Participant commands.

Thanks, Discord