jpa/polyglot/polyglot.composite/.settings/org.eclipse.wst.common.project.facet.core.prefs.xml

<root>
  <facet id="jpt.jpa">
    <node name="libprov">
      <attribute name="provider-id" value="jpa-no-op-library-provider"/>
    </node>
  </facet>
</root>