There's no such thing as a 'decertified' elector after the vote has been cast. Its made up pseudo-legal gibberish sold to the gullible and ignorant.
Here's the US Constitution:
Note: The following text is a transcription of the Constitution as it was inscribed by Jacob Shallus on parchment (the document on display in the Rotunda at the National Archives Museum.) The spelling and punctuation reflect the original.
www.archives.gov
I defy any of the Big Liars to quote the section of the Constitution that authorized 'decertification' of any elector.
You can't. Its made up nonsense.