Delete Dashboard
Perform the following steps to delete the dashboard:
1. From the Dashboard tab, click the Tools 
menu and click Delete Dashboard. Optionally, you can select the dashboard that requires to be deleted from the dashboard selector 
or click the Manage Dashboards 
menu. Click 
from the list of Dashboards. Select Delete Dashboard.
2. A confirmation message is displayed to verify the deletion of the dashboard.
3. Click OK, and the dashboard is moved to Recycle Bin. The deleted dashboard is stored in Recycle Bin for 30 days. For more information, see Recycle Bin.
Note: If you restore a Default dashboard from the Recycle Bin, it will not be marked as a Default dashboard again.