You can delete applications created in your project.
You can delete an application and all of its associated components using the Topology view in the Developer perspective:
Click the application you want to delete to see the side panel with the resource details of the application.
Click the Actions drop-down menu displayed on the upper right of the panel, and select Delete Application to see a confirmation dialog box.
Enter the name of the application and click Delete to delete it.
You can also right-click the application you want to delete and click Delete Application to delete it.