func (ph *peerHeap) removePeer(peerScore *peerScore) {
	heap.Remove(ph, peerScore.index)
}
func (ph *peerHeap) removePeer(peerScore *peerScore) {
	heap.Remove(ph, peerScore.index)
}
func ( ph * peerHeap ) removePeer ( peerScore * peerScore ) { heap . Remove ( ph , peerScore . index ) }
// removePeer remove peer at specific index.
removePeer remove peer at specific index .