In T375056 we made it so that Automoderator does a 'rollback' - undoing every sequential recent edit by the user being reverted. This means it can revert multiple edits in one action.
Its revert message, however, implies it only reverts one edit:
Undo revision [[Special:Diff/$1|$1]] by [[Special:Contributions/$2|$2]]
When editors rollback an edit, the edit summary used is:
Reverted edits by USER (talk) to last version by USER2
We should probably use the same message in Automoderator when we are reverting more than one edit. USER2 is the most recent editor prior to the first edit we're reverting.
We should also delete the system messages since they are no longer needed.
