How do I delete/remove an app from a Firebase project? [duplicate]
UPDATE: There is now an option to delete an app within your project. Go to your Firebase console, click app's setting gear, click manage. Click on the Advance Option's arrow, you'll see DELETE THIS APP.
--Old Answer--
There is no option to delete app, just the project. When you go to the setting icon of your app, click on Manage then you'll see the "Delete Project" below.