Remove caffe2::ShareData (#16139)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16139
Original commit changeset: 4b15a4c62995
Reviewed By: dzhulgakov
Differential Revision: D13677464
fbshipit-source-id: 1a644a88fac02b44feebac48ccc01bc72cc47edb
