Offhand, things that used to just be "AI": Expert systems, markov chains, genetic algorithms, data mining, and identification/classification.

People in the field would probably say they fall under the AI umbrella, but it's not the common viewpoint. Either someone can conceptualize how they'd work (expert systems) or they've been watered down and turned commonplace (markov chains in software keyboards, identification in Facebook images), and either way it disassociates the technology with the "intelligence" part of "artificial intelligence", so is no longer thought of as part of it.