Update the eden manifest to drop internal FB-specific dependencies
Update the eden manifest to drop internal FB-specific dependencies

Summary:
Remove the Facebook-specific dependencies from the Eden manifest: these
dependencies are now available directly in the Eden repository.

Reviewed By: chadaustin

Differential Revision: D18588009

fbshipit-source-id: 590c74e38e4e05939e6955839af3ebb959f9251b

facebook/wangle,facebook/wangle,facebook/wangle