Use the Actions tab to execute operations on selected and targeted devices. In the Web console, you can delete devices from the list of managed computers.
Delete devices lets you delete selected or targeted devices from the list of managed computers. The delete function can delete single or multiple devices from any group (either a default group or user-created group). Once a device has been deleted from a group, it is completely removed from all lists of managed/inventoried devices, including the default All devices group.
If you are deleting a large number of devices, the operation may time out. If the operation times out, try breaking up the operation into smaller operations.