File _link of Package python3-pyxb

<link project="SUSE:SLE-15-SP4:GA" package="python-pyxb" baserev="52d7775fc321858972d6b9b4ffb515fd">
  <patches>
    <delete name="python-pyxb.changes"/>
    <delete name="python-pyxb.spec"/>
  </patches>
</link>