p2p: cleanup transport interface (#7071)

This is another batch of things to cleanup in the legacy P2P system.

test/e2e/runner/setup.go

@@ -237,7 +237,6 @@ func MakeConfig(node *e2e.Node) (*config.Config, error) {
 	cfg.RPC.ListenAddress = "tcp://0.0.0.0:26657"
 	cfg.RPC.PprofListenAddress = ":6060"
 	cfg.P2P.ExternalAddress = fmt.Sprintf("tcp://%v", node.AddressP2P(false))
-	cfg.P2P.AddrBookStrict = false
 	cfg.P2P.QueueType = node.QueueType
 	cfg.DBBackend = node.Database
 	cfg.StateSync.DiscoveryTime = 5 * time.Second