compat_build: remove pyc BuildRequires
    
    This error is seen on the compat_build
    find: '.../rpmbuild/BUILDROOT/clang13-13.0.0-5.fc36.x86_64/
      usr/lib/python3.10/site-packages': No such file or directory
    
    python3-clang is not part of the compat_build so ifdef out
    the problem area.
    
    Signed-off-by: Tom Rix <trix@redhat.com>