“66be6fed3458c26a679062b5689357c070de39e7”上不存在“paddle/legacy/gserver/layers/PoolLayer.h”
* Rewrite is_empty op to avoid unnecessary data transform. test=develop * Add the implementation of InferShape and InferVarType for is_empty op. test=develop * Rewrite is_empty op to avoid directly inherit OperatorBase. test=develop