Revert D28474877: Provide pre-extracted DataPtrs when completing a Future with a Message
Test Plan: revert-hammer
Differential Revision:
D28474877 (https://github.com/pytorch/pytorch/commit/bdf6a4bffd078023d7b47e17f4ba75d5b91ffea9)
Original commit changeset: e68d7d45f1c1
fbshipit-source-id: b89858b4e82f4f766031cfaad9fc736cf8097816
