activation: remove setting of NextProtos from tls config to take advantage of HTTP/2 where possible

activation/listeners.go

@@ -48,8 +48,6 @@ func TLSListeners(unsetEnv bool, tlsConfig *tls.Config) ([]net.Listener, error)
 	}
 
 	if tlsConfig != nil && err == nil {
-		tlsConfig.NextProtos = []string{"http/1.1"}
-
 		for i, l := range listeners {
 			// Activate TLS only for TCP sockets
 			if l.Addr().Network() == "tcp" {