Unify language files (#3899)

Co-authored-by: Felipe Nogueira <contato.fnog@gmail.com>
Co-authored-by: Yaron Shahrabani <sh.yaron@gmail.com>
Co-authored-by: Kevin Papst <kpapst@gmx.net>

translations/invoice-renderer.pt.xlf

@@ -36,10 +36,6 @@
         <source>timesheet</source>
         <target state="translated">Quadro de horários</target>
       </trans-unit>
-      <trans-unit id="m1UyfD9" resname="service-date">
-        <source>service-date</source>
-        <target state="needs-translation">Freelancer</target>
-      </trans-unit>
     </body>
   </file>
 </xliff>