Remove overrided implementation that is now the same as the original version.

theano/sandbox/cuda/var.py

@@ -44,9 +44,6 @@ class _operators(tensor.basic._tensor_py_operators):
 class CudaNdarrayVariable(_operators, Variable):
     pass
 
-    # override default
-    def __repr_test_value__(self):
-        return repr(theano.gof.op.get_test_value(self))
 CudaNdarrayType.Variable = CudaNdarrayVariable