If you can help or wish to become one of the maintainers - just start helping. You can find more RVM related projects at RVM Github organization.
When you delete a gemset, rvm will prompt you to confirm the deletion.
$ rvm gemset use teddy $ rvm gemset delete teddy
To skip confirmation, pass the --force flag:
$ rvm gemset use teddy $ rvm --force gemset delete teddy
By default, rvm deletes gemsets from the currently selected Ruby interpreter. To delete a gemset from a different interpreter, say 2.0.0, run your command this way:
$ rvm 2.0.0 do rvm gemset delete teddy