channeldb+routing: remove tx arg for ForEachNode

autopilot/graph.go

@@ -121,7 +121,7 @@ func (d dbNode) ForEachChannel(cb func(ChannelEdge) error) error {
 //
 // NOTE: Part of the autopilot.ChannelGraph interface.
 func (d *databaseChannelGraph) ForEachNode(cb func(Node) error) error {
-	return d.db.ForEachNode(nil, func(tx kvdb.ReadTx, n *channeldb.LightningNode) error {
+	return d.db.ForEachNode(func(tx kvdb.ReadTx, n *channeldb.LightningNode) error {
 
 		// We'll skip over any node that doesn't have any advertised
 		// addresses. As we won't be able to reach them to actually