This task requires permissions that are found in all default security roles Defined sets of privileges.The security role assigned to a user determines which tasks the user can perform and which parts of the user interface the user can view. All users must be assigned at least one security role in order to access the system.. More information about specific permissions and performing this task while offline: Dashboard Permissions
Only the user who created a user dashboard A dashboard that is owned by individual users or teams. A user dashboard can be assigned to or shared with other users or teams. or a user with whom the dashboard is shared can delete a dashboard. The user with whom a dashboard is shared can delete it only when assigned Delete privileges at the time of sharing the dashboard.
In the Navigation Pane, click Workplace. Then, under My Work, click Dashboards.
In the Dashboards drop-down box, select the dashboard that you want to delete, and in the Dashboard Management group, click Delete.
In the confirmation message, click OK.
Important
If you delete your default dashboard, the next time you navigate to the Dashboards area, you will see the default system dashboard.