slapos_erp5: no need to create a dedicated local_roles from compute node source_administration

Only slapos manager will handle compute nodes

master/bt5/slapos_erp5/PortalTypeRolesTemplateItem/Compute%20Node.xml

@@ -6,13 +6,6 @@
    <multi_property id='categories'>local_role_group/shadow</multi_property>
    <multi_property id='base_category'>aggregate</multi_property>
   </role>
-  <role id='Assignee'>
-   <property id='title'>Compute Node Agent</property>
-   <property id='description'>Monovalued role</property>
-   <property id='base_category_script'>ERP5Type_getSecurityCategoryFromContent</property>
-   <multi_property id='categories'>local_role_group/user</multi_property>
-   <multi_property id='base_category'>source_administration</multi_property>
-  </role>
   <role id='Assignor'>
    <property id='title'>Group company</property>
    <multi_property id='categories'>local_role_group/group</multi_property>