Shut off NCCL when using only 1 device - #1678

Shut off NCCL when using only 1 device#1678

elliottslaughter wants to merge 1 commit into

flexflow:masterflexflow/flexflow-train:masterfrom

elliottslaughter:nccl-single-deviceelliottslaughter/flexflow-train:nccl-single-deviceCopy head branch name to clipboard