The built-in asset states can not be deleted, currently. You can, however, add your own asset states under Configuration\Asset Pages. You will have to keep in mind, though, that an asset with another asset state then 'Active' will not be displayed in most built-in reports and views within Lansweeper, as these filter on the asset state 'Active'. You can of course built custom reports that will display either all asset states or filter on a specific asset state by linking the database table tblState to tblAssetCustom in your report.