We have followed documentation to delete an api which was created from API gateway using the "set as portal managed service" assertion.
We have followed the steps below
In portal we still see the deleted API with the status "Error" and a Error Message saying "API has been deleted from proxy" .
Portal 5.2.2 Portal 5.3
We have created a fix for this which will be available in portal 5.3.1 .
When customer update to Portal 5.3.1 and "Portal Sync Gateway Published API" scheduled task will be triggered the records for GW published API's with State as Deleted and Deployment Status as Error will be cleared out/deleted and will not be displayed anymore.