The delete button is right there where the help page says it is.
To shut down a project using the Cloud Platform Console:
Open the Settings page in the Google Cloud Platform Console.
Click Select a project.
- Select a project you wish to delete, and click
Open.- Click Shut down.
- Enter the Project ID and click Shut down.
Please note that there is a 7-day grace period before the project is actually purged from the system. Which means you won’t be able to immediately create another project with the same name.