Google's Pixel and Pixel XL both have 3.5mm headphone jacks, but their successors might not. A new unconfirmed rumor is now claiming as much, and it's apparently based on "an internal Google document". The nature of that documentation hasn't been shared because it would put the source of this leak at risk, allegedly. While we don't get a picture of said document, we are told that "the language used presents the removal of the jack as a matter of fact" - so this isn't something that Google is just considering at the moment, instead the decision has already been made. That said, all of this...
Source: http://www.gsmarena.com/google_pixel_2_will_allegedly_ditch_the_headphone_jack-news-23831.php