Delete requires_tensor (#40184)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40184
Whenever requires_tensor is True, it is also the case that abstract
is true. Thus, it is not necessary to specify requires_tensor.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D22187353
Pulled By: ezyang
fbshipit-source-id: d665bb69cffe491bd989495020e1ae32340aa9da
