To delete an existing report:
Login to the system and select EPM from the product navigator.
Navigate to the Reports section in the navigation bar. You will be able to view a list of in-built reports made available to you. The custom Reports will show Custom Report highlighted next to the title of the report.
Click on the Report Designer button and a list of reports will be available.
You can delete them if they are no longer in use by selecting the Delete icon on the extreme right side of the report.