- Removed `redbot.cogs.mod.checks` module
- Moved logic for formatting a user-friendly list of permissions to `redbot.core.utils.chat_formatting`
- `[p]voice(un)ban` and `[p](un)mute voice` now check permissions in the user's voice channel
Resolves#2296.
Signed-off-by: Toby Harradine <tobyharradine@gmail.com>