Below the MyProject tab there are 4 blue tabs. We'd like to remove the tab "LongTimeAgo."
We can do that because it is empty (note that name is in italic letters), and there is an circled "X" at the end of the line.
Click the X. You then see a listing of all the empty blue tabs.
Select the tab or tabs you want to delete.
Click the "Delete" button.
You will be taken back to where you where previously, after the delete action is completed.