service: remove unnecessary peer clone (#5360)
service: remove unnecessary peer clone (#5360)

Signed-off-by: siddontang <af844ceae3db5e439d854e515a05975b00c8a1e2@gmail.com>
BusyJay/tikv,pingcap/tikv,pingcap/tikv,c4pt0r/tikv,BusyJay/tikv,BusyJay/tikv,BusyJay/tikv