Terminal 1 at LHR seems to have gotten rid of most, if not all of it's carpets recently and replaced it all with tiles or Lino style. Indeed, Gate 20 used to have green grocer style carpet as it was transformed to look like the Games Terminal. Now it's been replaced by lino style with a grass pattern.*
I think EDI has done the same since the GIP takeover.
I seem to recall the Inside Gatwick program going on about there being a need to rip out all the carpeting as it cost so much to clean and replace when it ripped or wore out. Add to that the fact it retained dirt, dust, moisture and smells a lot more than lino or tiles do and some staff even reported there being fleas inside the carpets in some areas!
*I do think T1, Gate 20 was an odd choice to have made in order to store all the Olympics related stuff from the specially created Games Terminal. I mean it's due to be knocked down pretty soon, so it seems a rather short lived legacy.