Bug 33991: Remove unused features
For simplification, we remove some unused features. Those features can still be reimplemented externally if needed.
For example, the "rbm rpm" command can be replaced with "rbm build --step rpm" and a definition of an rpm step in rbm.conf.
We remove the following options:
- version_command
- rpm
- srpm
- rpmspec
- rpm_rel
- debian_create
- deb
- deb_src
- use_pbuilder
- debian_revision
And the following commands:
- rpmspec
- rpm
- srpm
- deb-src
- deb
- pkg
- publish
This replaces !2 (closed). Closes #33991 (closed).