Remove datatype from Storage and StorageImpl (#38870)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38870
* Removed dtype data member from StorageImpl
* Removed any methods or method arguments in Storage/StorageImpl that deal with dtypes
* Update all callers of the changed API
Part of issue https://github.com/pytorch/pytorch/issues/33950
Original PR: https://github.com/pytorch/pytorch/pull/38038
Reviewed By: albanD
Differential Revision: D21549645
Pulled By: ezyang
fbshipit-source-id: 4289b356c55ff6b9530376a79343b99b540ee3de
