To delete an entity click the Delete button located on the entity row as illustrated
The ItemNr field shows the number of items currently contained in the entity. Deleting an entity clears its contents too.
When an entity is deleted, all InfoCube versions structured by that entity are also removed. The In use column, indicates the presence of data in one or more InfoCubes, by showing a small cube icon; deleting the entity also deletes the InfoCube version and its data.