remove print used for debug and use the default mode in a test, not debug mode.

theano/tensor/elemwise.py

@@ -1304,7 +1304,6 @@ class MulWithoutZeros(scalar.BinaryScalarOp):
     commutative = True
     associative = True
     def impl(self, x, y):
-        print x,y
         if x == 0:
             return y
         if y == 0:

theano/tensor/tests/test_elemwise.py

@@ -356,7 +356,7 @@ class test_Prod(unittest.TestCase):
 
         mul1 = ProdWithoutZeros(axis=0)(x)
 
-        fn_debug = theano.function([x], mul1, mode='DEBUG_MODE')
+        fn_debug = theano.function([x], mul1, mode=self.mode)
 
         fn_debug(a)