erp5_data_notebook: Remove unused base properties from Data Notebook Module

bt5/erp5_data_notebook/SkinTemplateItem/portal_skins/erp5_data_notebook/DataNotebook_view.xml

@@ -77,7 +77,6 @@
                         <string>my_title</string>
                         <string>my_reference</string>
                         <string>my_source_title</string>
-                        <string>my_activity</string>
                         <string>my_process</string>
                       </list>
                     </value>