Remove Instance Data

Currently our interiors group is using bentley Architecture to add instance data to a series of 2d cells used in their furniture plans.

They are doing so they can make of the datagroup explorer reporting tools and the Space planning search tools in V8i to create FFE schedules.

This ahs been going well however the question has come up about how to delete instance data from an element.

Is there are tool for this in Bentely Architectue. I have had a look but can only find ways to edit the data not remove it.