Remove breakpoint from test_adaptive_fit

While useful when debugging test failures, breakpoints should only be
used when running test cases interactively.

tests/test_adaptive_fit.py

@@ -164,7 +164,6 @@ def test_adaptive_fit_predation_fixed_exps():
                 if resampled:
                     assert not np.array_equal(values[0], values[step])
                 elif not np.array_equal(values[0], values[step]):
-                    breakpoint()
                     assert np.array_equal(values[0], values[step])
 
     # Ensure that parameters vary over the final pass.