Back out "[flow] use result of realpath in Module_js"
Back out "[flow] use result of realpath in Module_js"

Summary:
Original commit changeset: a1e3efecbe86

Original Phabricator Diff: D35805747 (https://github.com/facebook/flow/commit/1f7e905ac84ee44f90e4c46894297e57f367569d)

Reviewed By: mroch

Differential Revision: D35977586

fbshipit-source-id: 68f7ed70136b220eb1060fafe647dabda86a6644

mroch/flow,facebook/flow,mroch/flow,facebook/flow,mroch/flow,mroch/flow,facebook/flow,mroch/flow,facebook/flow,facebook/flow,mroch/flow,facebook/flow,mroch/flow,facebook/flow