In Eclipse's Project Explorer view there is a project named "JSR-109 Web Services" that can not be deleted or removed.
I did not create this project. It came to Project Explorer by itself.
How do I remove this "JSR-109 Web Services"?
Select "Customize View..." on the Project Explorer view's menu (on the view's upper-right upside-down triangule button).
Select the "Content" tab and uncheck "JSR-109 Web Services Index".