How to Delete Audio Permanently ? Logic or Peak

Question

hi, when you double-click an audio region in the arrange, it's opens for
editing. You delete some audio, save. Close the Logic file. Quit Logic.
BUT you could later get the audio back by start logic, open that song,
open the audio editor and choose "undo" and like magice the previously
deleted audio reappears.
I want it gone, forever, unrecoverable.
I've deleted the "LogicSampleUndo" files, i've Emptied the Trash per
page 90 of the ref manual.
What do I have to do to actually, really, finally delete this audio ?
I've had to open the audio i peak and do the delete, then save, then logic can't bring it back
but I'd like to just use Logic.

Answer 1

thank you for the reply,
but,
I meant that I want to delete a "protion" of an audio file. This is why I use Logic's sample editor.
Example, a voice dialog that lasts 8 bars. I was to delete, permanantly, the last 2 bars.
Normally, I would open the audio file in the sample editor, select the last 2 bars and hit
the delete key, Logic will show that it's "moving samples" and will warn that I am about to
delete. I hit yes, or delete and the waveform display updates to show that the last 2 bars
are deleted.
But under undo I can aways get the last 2 bars back. I want to NEVER get them back.
Empty the Logic trash?
Kill the undo?
What hidden file?