Yahoo indexed pages not on server

How to get rid of extra pages

[dupac]

Yahoo is still showing a lot of pages indexed when we do "site:" even though we dont have those pages on our server. We feel that may be effecting our rankings in yahoo.

What is the most efficient way of getting urls out of yahoo index?

thanks

[dupac]

Any suggestions? What can we do to take out the extra pages from yahoo index if they are not on our server any more.