remove leftover peerstore implementation in the root package

peerstore.go

@@ -1,68 +1,10 @@
 package peerstore
 
 import (
-	"fmt"
-	"io"
-
 	"github.com/libp2p/go-libp2p-core/peer"
 	pstore "github.com/libp2p/go-libp2p-core/peerstore"
 )
 
-var _ pstore.Peerstore = (*peerstore)(nil)
-
-type peerstore struct {
-	pstore.Metrics
-
-	pstore.KeyBook
-	pstore.AddrBook
-	pstore.ProtoBook
-	pstore.PeerMetadata
-}
-
-func (ps *peerstore) Close() (err error) {
-	var errs []error
-	weakClose := func(name string, c interface{}) {
-		if cl, ok := c.(io.Closer); ok {
-			if err = cl.Close(); err != nil {
-				errs = append(errs, fmt.Errorf("%s error: %s", name, err))
-			}
-		}
-	}
-
-	weakClose("keybook", ps.KeyBook)
-	weakClose("addressbook", ps.AddrBook)
-	weakClose("protobook", ps.ProtoBook)
-	weakClose("peermetadata", ps.PeerMetadata)
-
-	if len(errs) > 0 {
-		return fmt.Errorf("failed while closing peerstore; err(s): %q", errs)
-	}
-	return nil
-}
-
-func (ps *peerstore) Peers() peer.IDSlice {
-	set := map[peer.ID]struct{}{}
-	for _, p := range ps.PeersWithKeys() {
-		set[p] = struct{}{}
-	}
-	for _, p := range ps.PeersWithAddrs() {
-		set[p] = struct{}{}
-	}
-
-	pps := make(peer.IDSlice, 0, len(set))
-	for p := range set {
-		pps = append(pps, p)
-	}
-	return pps
-}
-
-func (ps *peerstore) PeerInfo(p peer.ID) peer.AddrInfo {
-	return peer.AddrInfo{
-		ID:    p,
-		Addrs: ps.AddrBook.Addrs(p),
-	}
-}
-
 func PeerInfos(ps pstore.Peerstore, peers peer.IDSlice) []peer.AddrInfo {
 	pi := make([]peer.AddrInfo, len(peers))
 	for i, p := range peers {