remove rouge raise in helper function (#58914)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58914
Only the top-level functions `assert_(equal|close)` should raise the
exception to keep the traceback managable.
Test Plan: Imported from OSS
Reviewed By: anjali411
Differential Revision: D29259408
Pulled By: mruberry
fbshipit-source-id: 40dd52eec6f9e8166b3b239d5172ee44b749e8dc
