Revert "TUN-6617: Dont fallback to http2 if QUIC conn was successful."

This reverts commit 679a89c7df.

supervisor/tunnel.go

@@ -26,7 +26,6 @@ import (
 	"github.com/cloudflare/cloudflared/signal"
 	"github.com/cloudflare/cloudflared/tunnelrpc"
 	tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
-	"github.com/cloudflare/cloudflared/tunnelstate"
 )
 
 const (
@@ -191,7 +190,6 @@ type EdgeTunnelServer struct {
 	edgeAddrs         *edgediscovery.Edge
 	reconnectCh       chan ReconnectSignal
 	gracefulShutdownC <-chan struct{}
-	tracker           *tunnelstate.ConnTracker
 
 	connAwareLogger *ConnAwareLogger
 }
@@ -274,12 +272,6 @@ func (e EdgeTunnelServer) Serve(ctx context.Context, connIndex uint8, protocolFa
 			return err
 		}
 
-		// If a single connection has connected with the current protocol, we know we know we don't have to fallback
-		// to a different protocol.
-		if e.tracker.HasConnectedWith(e.config.ProtocolSelector.Current()) {
-			return err
-		}
-
 		if !selectNextProtocol(
 			connLog.Logger(),
 			protocolFallback,
@@ -469,7 +461,6 @@ func serveTunnel(
 		nil,
 		gracefulShutdownC,
 		config.GracePeriod,
-		protocol,
 	)
 
 	switch protocol {