avoid useless EO/VO relationship
avoid useless EO/VO relationship

Signed-off-by: Qun Li <1ea81f54854048d0a4d4fd61caceabb2a843281c@zstack.io>

AlanJager/zstack,AlanJager/zstack,MatheMatrix/zstack,zstackio/zstack,MatheMatrix/zstack,AlanJager/zstack,zstackio/zstack,zstackio/zstack,MatheMatrix/zstack