Useless comment removed.

theano/gpuarray/type.py

@@ -476,7 +476,6 @@ class GpuArrayType(Type):
         return ['gpuarray']
 
     def c_code_cache_version(self):
-        # import pdb; pdb.set_trace()
         ver = pygpu.gpuarray.abi_version()
         # we only use the major version since the minor revision are compatible.
         return (2, ver[0])