Step 1 : Select all projects icon on the left hand side 

Note: You can also select “view all projects” from the task module icon on the left hand side to get to the all projects window 

Step 2: Chose the ellipsis icon next to the project that you want to delete

Step 3 : Enter your project name again for you to delete the project. 

Learn more : 

1) How to archive a project?