Delete defunct USE_SIMPLE_BASE_CTOR_DTOR (#15144)
Summary:
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15144
Differential Revision: D13440872
Pulled By: ezyang
fbshipit-source-id: 2b1d73fac0c63729ba01d8f129642334ae9d9cf3
