How can I delete all editing bookmarks at once in Xemacs?

Hello list,

once again I like to ask, wether anyone knows how I can delete bookmarks in
Xemacs all at once? I would like to combine this automatically with leaving
Xemacs. Of course it is also possoble, ot delete all bookmarks during the
startup by a command in init.el for example. Unfortunately, I don't know th
command:-(

My first email at 4.2.04 hasn't been answered, I hope to get an answer now
;-)

Best wishes

Alexander