Odoo-Build/snippets/purchase.report_purchasequotation_document.remove_date_planned.xml

<data inherit_id="purchase.report_purchasequotation_document" priority="50">
    <xpath expr="//th[@name='th_expected_date']" position="replace">
  </xpath>
    <xpath expr="//span[@t-field='order_line.date_planned']/.." position="replace">
  </xpath>
</data>