Summary:
This removes the null-check on Yoga config added (we think we root-caused the issue), and adds an assertion to the public API accepting a config that it is non-null.
There are more changes to config setting that will come later.
Changelog:
[Internal]
Reviewed By: javache
Differential Revision: D43273456
fbshipit-source-id: cba498352d114a3fa2694f3a144f5f01a83d3190
220d2582c9