He's not asking what the point of wreckage is, or why it's there, or about its performance, or caring about your server stats. He's asking how it can be done to remove it.
I personally don't know, because I haven't really tried modding any scripts. Just studying them -- I would think that due to the way wrecks are handled, it's probably very easily done. Wrecks are, if I am remembering right, treated as an entity anyway. You could write a script that finds all of these entities in a given sector and remove them from play. Attac hthe script to the player entity, or something, and you could set it up so that the player can run a command like /clean or something -- hell maybe even have it run the function when a player warps to a new sector, or loads into another one.