Remove RPM spec file

Remove RPM spec file

Building packages for distributions is typically something highly
distribution specific. While there are widely used package formats
like RPM, implementing a de-facto standard, the build process,
list of files actually packaged, list of required dependencies,
package grouping, package versioning, etc... is still _very_
distribution specific. In fact, this spec file completely fails to
address some of these points.

Actual RPM based distributions out there currently use their own,
distribution specific, RPM spec files that were possibly _based_ on
this one at some point (judging from similar descriptions).

The spec file _may_ have worked at some point, but it definitely doesn't
work with the new build system and there is no real reason to fix it
(which, by definition, isn't possible for the reasons above) and drag it
along for another decade or two.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>