Deleting of IfcElements bonsai bim 0.8.3 and 0.8.4
first i created an annotation curve and some text:

as i wanted to have real 3d elements from there i extruded text and curve( blender):

after that i created IfcBuildings and IfcBuildingStoreys (bonsaibim)

now to my problem:
i want to delete unneeded IfcAnnotationElements as shown in the first picture, but whatever i try, deleting hierarchies, objects,???!!!!! and so on, and so on,....(bonsaibim) i always end up with a set of unreferenced elements without ifcclasses:

what can i do to get rid of those phantom elements?
Comments
just one solution, maybe not the only and best one. If you are lucky, they are a bulk in the .ifc file and you can delete them in the file (with texteditor #stepid).
thank you mas!
this (notasolution) is what i do already, but i was thinking there must be a way to delete.
if not - why?
is it a bug?
cheers