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
diff --git a/torch/testing/_asserts.py b/torch/testing/_asserts.py
index 7979efb..0acae8a 100644
--- a/torch/testing/_asserts.py
+++ b/torch/testing/_asserts.py
@@ -401,7 +401,7 @@
         actual, expected, check_device=check_device, check_dtype=check_dtype, check_stride=check_stride
     )
     if exc:
-        raise exc
+        return exc
     actual, expected = _equalize_attributes(actual, expected)
 
     if (rtol == 0.0) and (atol == 0.0):