[IMP] project: list and pivot are not grouped by default in tasks

addons/project/views/project_views.xml

@@ -65,7 +65,6 @@
             <field name="res_model">project.task</field>
             <field name="view_mode">kanban,tree,form,calendar,pivot,graph</field>
             <field name="context">{
-                'group_by': 'stage_id',
                 'search_default_project_id': [active_id],
                 'default_project_id': active_id,
             }</field>