Remove project_config rules
Remove project_config rules

Summary:
These only exist to support a deprecated form of project generation which is
about to be removed.

Reviewed By: tkieft

Differential Revision: D4939323

fbshipit-source-id: 921998c50da17faa8d3b908736d9476ebc410a08

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho