- remove duplicated rb_ macros - they are in ruby

OBS-URL: https://build.opensuse.org/package/show/Base:System/rpm?expand=0&rev=201

rpm.spec

@@ -160,6 +160,7 @@ all installed packages.  RPM also supports database queries.
 
 %package devel
 Summary:        Include Files and Libraries mandatory for Development
+Group:          System/Packages
 Requires:       rpm = %{version}
 # for people confusing the one with the other
 Recommends:     rpm-build = %{version}
@@ -174,6 +175,7 @@ need an intimate knowledge of RPM packages in order to function.
 
 %package build
 Summary:        Tools and Scripts to create rpm packages
+Group:          System/Packages
 Requires:       rpm = %{version}
 Provides:       rpm:%_bindir/rpmbuild
 Provides:       rpmbuild