Do you really think how that will read in a history book? First, they'll list the impeachments, because, they happened. Then they'll record the deletions, along with some scathing commentary as to the futility of it all. There is no 'setting the record straight' and there is not an 'unimpeachment' process.
So enjoy your Kabuki~
FYI..thus far, all impeachments have been political warfare waged on an entirely partisan basis. Is how impeachment works..being a political process and not a criminal one.