Delete redefinitions of methods in Variable already present on Tensor. (#29667)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29667
Some previous implementations are defined in native_functions.yaml.
In this case, I don't define them explicitly in Tensor; instead
they are placed in VariableTypeManual.cpp. When I did this, I would
have deleted documentation; instead, this documentation was moved
to native_functions.yaml
This also replaces `current_version` with just `_version`.
This is a carved out portion of #28287, rebased past Tensor-Variable
merge.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D18504934
Pulled By: ezyang
fbshipit-source-id: be7adf45b637daffe2b0b1631eb31d967525fc31
