[FIX] stock_demand_estimate_matrix: remove action extension

no need to modify action, once the tree view is set as editable it
will work as itended, no need to remove form from the view modes.

stock_demand_estimate_matrix/views/stock_demand_estimate_view.xml

@@ -43,10 +43,5 @@
             </field>
         </field>
     </record>
-    <record
-        id="stock_demand_estimate.stock_demand_estimate_action"
-        model="ir.actions.act_window"
-    >
-        <field name="view_mode">tree,pivot</field>
-    </record>
+
 </odoo>