How can be deleted automatically rows in Assets Control looking from an excel file or from a value in a field

hello ,

We use Landesk 9.50.2.6

We import asset from some scheduled task that looks to Excel files , now we would find out a way to delete assets automatically from Assets Control.

For example .. if i put the Value DELETE in the Serial Number,  is it possible to creare a task that looks in that filed and if the field has DELETE , the task will delete the asset .

Or something like that

or is possible to delete asset only manually  ?

thanks in advance