They probably got rid of it because, while it kind of looks nice, it's a lot slower for the average user (who doesn't use search 100 times a day, thereby getting familiar with the icons). It actually takes a fair amount of time for people to memorize icons. Reading text is extremely quick for most people so text links are a natural. Plus they're lower on bandwidth which for Google, getting millions and millions of daily page views, could be a huge deal.
- Oshyan