Dimension should not have `name` property

[bartveneman]

Maybe other nodes also shouldn't have this property. Weird thing is that Dimension inside a MediaQuery Feature already has no name.

https://www.projectwallace.com/ast-explorer#JTIydGVzdCUyMCU3QiU1Q24lNUN0d2lkdGglM0ElMjAxMHB4JTNCJTVDbiU3RCU1Q24lNUNuJTQwbWVkaWElMjAobWluLXdpZHRoJTNBJTIwNjAwcHgpJTIwb3IlMjBwcmludCUyMCU3QiU3RCUyMg==