Remove old custom op implementation (#21085)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21085
Now that torch::jit::RegisterOperators() always passes through to torch::RegisterOperators() (see diffs stacked below this), we can remove the old custom op implementation.
Reviewed By: dzhulgakov
Differential Revision: D15542261
fbshipit-source-id: ef437e6c71950e58fdd237d6abd035826753c2e4
