I am confused about something: does the position of Communications Officer exist in the era of TNG/DS9/VOY? In both TOS and the prequel ENT we have a communications officer on the starship. But on TNG and beyond we do not seem to have communications officers, although Ezri does take the "communications station" in the final episode of DS9. On TNG, it seems like Worf handles the communications most of the time.
So what I'd like to know is, does the position of communications officer exist in the time of TNG? And if not, why has Starfleet gotten rid of it? I'm looking for an "in-universe" answer here.