Merge pull request #7942 from ryanpetrello/iso-removal

fix a bug that prevents the explicit removal of instances from groups

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

awx/main/management/commands/remove_from_queue.py

@@ -32,4 +32,7 @@ class Command(BaseCommand):
             sys.exit(1)
         i = i.first()
         ig.instances.remove(i)
+        if i.hostname in ig.policy_instance_list:
+            ig.policy_instance_list.remove(i.hostname)
+            ig.save()
         print("Instance removed from instance group")