How to delete a report section
Within the report design editor "Sections" tab, hover over the name of the section that you'd like to delete in the table of contents on the left-hand side of your screen.
Click the ellipsis "..." that appears, producing a drop-down menu. From this menu select "Delete".
There is no confirmation dialogue; the section will be deleted instantly.
Be sure to save your changes before exiting the design editor.