remove debug code.

theano/tensor/basic.py

@@ -531,7 +531,6 @@ class TensorType(Type):
 
     @staticmethod
     def may_share_memory(a,b):
-        import pdb;pdb.set_trace()
         #when this is called with a an ndarray and b
         #a sparce matrix, numpy.may_share_memory fail.
         if a.__class__ is b.__class__: