There's the Nexdock / Nexdock 2 [0], if to be believed that will be shipping later this year, And some other projects listed here in a Purism thread [1]
Is the opposite of what? Wrong variable was asking for a laptop without compute part to which they could strap a Pi. That’s exactly what the Nexdock is at least.
[0] http://nexdock.com/ [1] https://forums.puri.sm/t/librem-shell-idea-razer-project-lin...