/exec API: drop session reconnection support (#487)

internal/execstream/frame_test.go

@@ -7,21 +7,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestFrameRoundTripsWatermark(t *testing.T) {
-	frame := Frame{
-		Type:      FrameTypeHistory,
-		Watermark: 42,
-	}
-
-	payload, err := json.Marshal(frame)
-	require.NoError(t, err)
-
-	var decoded Frame
-	err = json.Unmarshal(payload, &decoded)
-	require.NoError(t, err)
-	require.Equal(t, frame, decoded)
-}
-
 func TestFrameRoundTripsTerminalSize(t *testing.T) {
 	frame := Frame{
 		Type: FrameTypeResize,