[fbsync] Remove leftover exception (#3717)

Reviewed By: NicolasHug

Differential Revision: D28169131

fbshipit-source-id: 107ee1c9c577bbab478585bb43ef29c64205635b

Author: cpuhrsch

test/test_models.py

@@ -195,7 +195,6 @@ def compute_mean_std(tensor):
                 # only the best way to assert results but also handles the cases
                 # where we need to create a new expected result.
                 self.assertExpected(output, name, prec=prec)
-                raise AssertionError
             except AssertionError:
                 # Unfortunately detection models are flaky due to the unstable sort
                 # in NMS. If matching across all outputs fails, use the same approach