After deleting Reporting Services Service Application, the reporting service database is gone but something is not removed from the configuraiton, and I am getting SharePoint foundation Event 3760 error

After setting up Reporting Services Service Application in SharePoint Central Admin, I had to delete it. I can tell the database is gone, but looks like something has not been updated properly in the configuration. I am getting SharePoint Foundation event 3760 saying it can not open the reporting services alerting database, which of cause does not exist because it has been deleted.

Here is the error I am getting:

How can I remove the database from the configuration? Where is the information stored? Because I already deleted teh reporting services service application, so I can't see it in SharePoint Central Admin.