They were simply not a necessity. They were only used to apologize for teamkills really. I never saw a useful one, so there's no real need for them to still be there. And they aren't.
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[S2] a.k.a. the Socom3.com! clan is recruiting for Socom: Confrontation. PM me if you're interested in joining
Yeah those things were great. You could always let them know you were sorry and this could prevent teamkilling/voting of someone. My friends and I also used to use these for messages and such. Good times.
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S2: G l o b e KC
S3: -GLOBE-
Clan: GSU