[rpmbuild] drop SCM parameters from copr-rpmbuild
- It allowed building packages without needing a task definition.
This sounds positive, but as a consequence, the task definition
needed to be artificially constructed inside the copr-rpmbuild
- It was not used within Copr infrastructure and therefore violated
the main purpose of copr-rpmbuild, which is reproducing Copr build
the same way it was done in Copr
- To some extent, it just duplicated what rpkg does