We had complaints that people couldn't install the CMake source
tarball on some secure systems because there were "corrupt bz2
files" in it... We do not use these sample*.bz2 files anyhow
in the CMake build, so we'll just remove them.
This allows for a built in bzip and zip capability, so external tools
will not be needed for these packagers. The cmake -E tar xf should be
able to handle all compression types now as well.