what is your reason for retagging it to sidewalk=none ?

it means the same and it just makes harder to process data

general migration was approved and in https://community.openstreetmap.org/t/sidewalk-none-to-no-proposed-automated-edit/128842/15 you claimed that both values mean the same and that edit is pointless - so I am confused why you are making the same kind of edit that you claimed to be pointless, just in an opposite direction