pytorch

ce705833 - Remove two unused TH definitions of rsqrt.

Remove two unused TH definitions of rsqrt. Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/29688 Differential Revision: D18465222 Pulled By: VitalyFedyunin fbshipit-source-id: a33880db389b82a8242c79723830e0a3afd3d498