Remove computed fields artifacts no longer used

Remove deleted field from notification payload

awx/main/migrations/0106_v370_remove_inventory_groups_with_active_failures.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.8 on 2020-01-27 12:39
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0105_v370_remove_jobevent_parent_and_hosts'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='inventory',
+            name='groups_with_active_failures',
+        ),
+    ]