Summary:
In theory, view configs can be hierarchical (one can depend on another), at least it was semi-supported on iOS once. And AFAIK there is only one component that seems to use this feature - `RCTComponentHostingView`, all other components essentially inherit RCTView or nothing. At the same time, RCTComponentHostingView does not really need it because RCTComponentHostingView itself does not expose any props.
Changelog: [Internal] Removed outdated warning
Reviewed By: kacieb
Differential Revision: D24095348
fbshipit-source-id: 5629c7433f151b72aae8201c58dd42062990b77e