chore: fix golangci-lint errors

Author: galargh

examples/chat/chat.go

@@ -167,7 +167,7 @@ func makeHost(port int, randomness io.Reader) (host.Host, error) {
 	)
 }
 
-func startPeer(ctx context.Context, h host.Host, streamHandler network.StreamHandler) {
+func startPeer(_ context.Context, h host.Host, streamHandler network.StreamHandler) {
 	// Set a function as stream handler.
 	// This function is called when a peer connects, and starts a stream with this protocol.
 	// Only applies on the receiving side.

examples/echo/main.go

@@ -96,7 +96,7 @@ func getHostAddress(ha host.Host) string {
 	return addr.Encapsulate(hostAddr).String()
 }
 
-func startListener(ctx context.Context, ha host.Host, listenPort int, insecure bool) {
+func startListener(_ context.Context, ha host.Host, listenPort int, insecure bool) {
 	fullAddr := getHostAddress(ha)
 	log.Printf("I am %s\n", fullAddr)
 
@@ -121,7 +121,7 @@ func startListener(ctx context.Context, ha host.Host, listenPort int, insecure b
 	}
 }
 
-func runSender(ctx context.Context, ha host.Host, targetPeer string) {
+func runSender(_ context.Context, ha host.Host, targetPeer string) {
 	fullAddr := getHostAddress(ha)
 	log.Printf("I am %s\n", fullAddr)
 

examples/ipfs-camp-2019/07-Messaging/pubsub.go

@@ -16,7 +16,7 @@ func pubsubMessageHandler(id peer.ID, msg *SendMessage) {
 	fmt.Printf("%s: %s\n", id.ShortString(), msg.Data)
 }
 
-func pubsubUpdateHandler(id peer.ID, msg *UpdatePeer) {
+func pubsubUpdateHandler(_ peer.ID, _ *UpdatePeer) {
 
 }