[FIX] hr_evaluation: remove group by survey

`survey_id` is a related field, non-stored.
This isn't possible to apply a group-by on a non stored field.

opw-647303

addons/hr_evaluation/hr_evaluation_view.xml

@@ -335,7 +335,6 @@
                     <field name="user_id" string="Interviewer"/>
                     <group expand="0" string="Group By">
                         <filter string="Interviewer" icon="terp-personal" domain="[]" context="{'group_by':'user_id'}"/>
-                        <filter string="Survey" icon="terp-stock_align_left_24" domain="[]" context="{'group_by':'survey_id'}"/>
                         <filter string="Status" name="group_state" icon="terp-stock_effects-object-colorize" domain="[]" context="{'group_by':'state'}"/>
                     </group>
                </search>