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ref: 9f30ffc0150ab69000b93bc8355a70b562bb65d1 parent: 4c3852c880d02df36b8ad6616ac51e8fa62e7a67 author: Huade Shi (huashi) <huashi@cisco.com> date: Tue Mar 28 10:46:27 EDT 2017
SliceBufferReallocate:clean unneed code