Customisation options required for Issue types and versions

How do I remove the default issue types and issue versions from the Custom Options setup screen? There are a lot of hard-coded values in there (1.0, 1.1, Functionality, etc.) that don’t apply to us and that I’d like to remove.

Hi, I would like have option to remove also TC labels. I know I can disable them, but you can’t disable the first one in the list. For example, there is always priority Critical active and I can’t change it.
If there have to be always one active I would like to have option to choose which one it is. !

Thank you for the request. We will take care of it in upcoming releases.