These commands solve a very, very specific problem that it's safe to assume nobody has. It's safe to assume that most config editing happens in the actual config-file, and changing class permissions is probably one of the last things people would expect to find a command for. Removing these commands renders some methods in ArenaMaster and ArenaClass obsolete.
MobArena

MobArena is an arena-style minigame for Spigot-based Minecraft servers
Getting Started
If you don't want to compile the plugin yourself, grab a release artifact from one of these two sites:
The wiki here on Github should have all the information you need to get started using the plugin.
Getting Help
If you run into problems or need help with something, feel free to hop on the MobArena Discord server or IRC channel to have a chat:
- Discord: Instant Invite
- IRC (#mobarena @ EsperNet): KiwiIRC Web Client
Remember, though, that these communication channels are idle chat, which means you likely won't get a response immediately. It could take anything from a couple of seconds to a day, but your message will be seen.
Contributing
Found a bug, got a suggestion, or want to dig into the code base? There are many ways to contribute to the project!
Get started here: Contributing