spec cleanup: drop redundant %{buildroot} cleaning
spec cleanup: drop redundant %{buildroot} cleaning

References:
http://pkgs.fedoraproject.org/cgit/rpms/redhat-rpm-config.git/commit/?id=159a65f
(~2010)

ClusterLabs/libqb,kgaillot/libqb,kgaillot/libqb,ClusterLabs/libqb,ClusterLabs/libqb,kgaillot/libqb