remove unnecesary nil check in peerinfo

libp2p/peerinfo.nim

@@ -105,13 +105,9 @@ proc publicKey*(p: PeerInfo): Option[PublicKey] {.inline.} =
     result = some(p.privateKey.getKey())
 
 proc id*(p: PeerInfo): string {.inline.} =
-  if not isNil(p):
-    result = p.peerId.pretty()
+  p.peerId.pretty()
 
 proc `$`*(p: PeerInfo): string =
-  if isNil(p):
-    return ""
-
   result.add("PeerID: ")
   result.add(p.id & "\n")