Simplify storage wrapping in TH. (#18855)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18855
ghimport-source-id: 01faa229fa4db901ab8539d3778b716d909ba4cf
Reviewed By: dzhulgakov
Differential Revision: D14790669
Pulled By: gchanan
fbshipit-source-id: 167b9bc9c9872743fa8f6040a26ddf7ff5789c27
