Remove legacy stuff

[StrangeOne101]

Description

A lot of legacy stuff is in the bot that should be removed. This consists of

• The pastebin regex parser
• Quiet/Loud channels

The pastebin regex parser should have all the pastebin regex responses converted to the new JSON equivalent. And all outdated responses should be removed (all pre 1.13 stuff).

Additionally, the config should be stripped of all references to these things as they are no longer needed.