Revert D30090760: [iOS] Add podspec for libTorch-lite nightly build
Test Plan: revert-hammer
Differential Revision:
D30090760 (https://github.com/pytorch/pytorch/commit/e182b459d94fe77c1d9f623c94fc2621c8cc55de)
Original commit changeset: 361aa2ed24a1
fbshipit-source-id: 9c0dfee80a80eb012b142d3928204d6eb8025b0a
