You have unlimited projects in your Giraffe account, so deletion is note required. However, if you made a project by mistake or were just testing something, you may not need it any longer.
Here's how to delete it.
Open Project Settings on the left. The icon looks like a cog.
Scroll to the bottom of the settings window.
Click "Delete Project"
Confirm Deletion:
Cancel: return to the project without deleting
Delete: Delete the project permanently
Warning: Deleting a project cannot be undone!