Summary:
These files are remnants of experimentation functions from D16687367 (dcfdb955b3). They do not seem to be included anywhere anymore, and we already have a YGExperimentalFeature setter in config we can use in the more common case.
Changelog:
[Internal]
Differential Revision: D42241980
fbshipit-source-id: b5c6e8337313789e9c988c54a99bfbad2b840520
