[BUG]Not able to remove gateways after removing it from the code.

[karthikpeddi1989]

Release version

v6.0.1.1

Describe the bug

In the api code, if we add the gateway, we are able to see the gateway in apim.
If we delete the gateway in api code, the gateway is not getting deleted.

Expected behavior

Under artifacts -> gateways -> gateway name -> apis -> yourapi --> Gateway is added in apim api collection..
Under artifacts -> gateways -> gateway name -> apis -> yourapi [remove this one] --> Gateway should be removed from apim api collection

Actual behavior

Under artifacts -> gateways -> gateway name -> apis -> yourapi --> Gateway is added in apim api collection.. [working as expected]
Under artifacts -> gateways -> gateway name -> apis -> yourapi [remove this one] --> Gateway is not getting removed from apim api collection

Reproduction Steps

Under artifacts -> gateways -> gateway name -> apis -> yourapi --> Gateway is added in apim api collection.. [working as expected]
Under artifacts -> gateways -> gateway name -> apis -> yourapi [remove this one] --> Gateway is not getting removed from apim api collection

[github-actions]

  Thank you for opening this issue! Please be patient while we will look into it and get back to you as this is an open source project. In the meantime make sure you take a look at the [closed issues](https://github.com/Azure/apiops/issues?q=is%3Aissue+is%3Aclosed) in case your question has already been answered. Don't forget to provide any additional information if needed (e.g. scrubbed logs, detailed feature requests,etc.).
  Whenever it's feasible, please don't hesitate to send a Pull Request (PR) our way. We'd greatly appreciate it, and we'll gladly assess and incorporate your changes.