You might have one or more assets that you want to delete in bulk. You will do this from the asset list which you can find under the "Asset List" tab in the left hand navigation.

Select one or more devices with the check boxes in the left column or select all with the box at the top of the column. Then click on "Choose an Action" dropdown.

Select Delete Assets from the bottom of the dropdown list.

A modal will pop up with a count of how many assets you have selected to update. You will be triggered with a note. Click update to delete.