title: Remove child admins from sidemenu in sonata-admin
body: <p>I have one <code>EmployeeAdmin</code> in sonata-admin, configured with three child admins:</p>
  
  <pre><code>sonata.admin.employee:
      class: Medicina\InasistenciasBundle\Admin\EmployeeAdmin
      tags:
          - { name: sonata.admin, manager_type: orm, group: "Contenido", label: "Empleados", label_translator_strategy: "sonata.admin.label.strategy.underscore" }
      arguments:
          - ~
          - Medicina\InasistenciasBundle\Entity\Employee
          - MedicinaInasistenciasBundle:EmployeeCRUD
      calls:
          - [ setTranslationDomain, [MedicinaInasistenciasBundle]]
          - [ addChild, [@sonata.admin.compensatory_part]]
          - [ addChild, [@sonata.admin.compensatory]]
          - [ addChild, [@sonata.admin.absence]]
  </code></pre>
  
  <p>the child admins are all pretty much the same, here's one of them:</p>
  
  <pre><code> sonata.admin.compensatory_part:
      class: Medicina\InasistenciasBundle\Admin\CompensatoryPartAdmin
      tags:
          - { name: sonata.admin, manager_type: orm, group: "Contenido", label: "Módulos de Tiempo",label_translator_strategy: "sonata.admin.label.strategy.underscore" }
      arguments:
          - ~
          - Medicina\InasistenciasBundle\Entity\CompensatoryPart
          - MedicinaInasistenciasBundle:DeleteValidationCRUD
      calls:
          - [setTranslationDomain, [MedicinaInasistenciasBundle]]
  </code></pre>
  
  <p>How can I avoid the child templates from showing up in sonatas side menu?</p>
  
  <p><img src="https://i.stack.imgur.com/e2f3H.jpg" alt="screenshot of sonata menu"></p>
  
  <p>I have tried removing the <strong>group</strong> and <strong>label</strong> tags, but then sonata just sticks them in an 'Default' group with no name. I'm sure is something trivial, but I can't seem to find it in the documentation. Any ideas?</p>