removed useless silencing of error.

theano/tensor/tests/test_basic.py

@@ -1961,17 +1961,12 @@ class T_subtensor(unittest.TestCase):
         n = self.shared(numpy.ones((), dtype=self.dtype))
         t = theano.tensor.Subtensor([])(n)
         self.assertTrue(isinstance(t.owner.op, Subtensor))
-        # Silence expected error messages
-        _logger = logging.getLogger('theano.gof.opt')
-        oldlevel = _logger.level
-        _logger.setLevel(logging.CRITICAL)
         mode = self.mode
         self.mode = mode.excluding("local_useless_subtensor")
         try:
             self.eval_output_and_check(t)
         finally:
             self.mode = mode
-            _logger.setLevel(oldlevel)
 
     def test1_err_invalid(self):
         n = self.shared(numpy.ones(1, dtype=self.dtype))