Installation app doesn't require signal processors anymore

mayan/apps/installation/apps.py

@@ -1,7 +1,6 @@
 from __future__ import unicode_literals
 
 from django import apps
-from django.db.models.signals import post_migrate
 from django.db.utils import DatabaseError
 from django.dispatch import receiver
 from django.utils.translation import ugettext_lazy as _
@@ -15,18 +14,11 @@ from .links import link_menu_link, link_namespace_details, link_namespace_list
 from .models import Installation
 
 
-def create_installation_instance(sender, **kwargs):
-    if kwargs.get('app') == 'installation':
-        Installation.objects.get_or_create()
-
-
 class InstallationApp(apps.AppConfig):
     name = 'installation'
     verbose_name = _('Installation')
 
     def ready(self):
-        post_migrate.connect(create_installation_instance, dispatch_uid='create_installation_instance')
-
         register_model_list_columns(PropertyNamespace, [
             {
                 'name': _('Label'),