unwrite
Verb
Meaning
To cancel, as what is written; to erase.
Source: Webster's dictionaryRelated terms
Examples
We can destroy what we have written, but we cannot unwrite it.
But there are forces that don't let you turn back and undo things, because to do so would be to deny what is already in motion, to unwrite and erase passages, to shorten the arc of a story you don't own.