Remove useless VPNConfigurationInline class

coin/vpn/admin.py

@@ -7,12 +7,6 @@ from coin.configuration.admin import ConfigurationAdminFormMixin, IPSubnetInline
 from coin.utils import delete_selected
 
 
-class VPNConfigurationInline(admin.StackedInline):
-    model = VPNConfiguration
-    # fk_name = 'offersubscription'
-    readonly_fields = ['configuration_ptr']
-
-
 class VPNConfigurationAdmin(ConfigurationAdminFormMixin, PolymorphicChildModelAdmin):
     base_model = VPNConfiguration
     list_display = ('offersubscription', 'activated', 'login',