govmm: Drop QEMU's Daemonize knob

Code isn't used anymore.

Signed-off-by: Greg Kurz <groug@kaod.org>

src/runtime/pkg/govmm/qemu/qemu.go

@@ -2684,9 +2684,6 @@ type Knobs struct {
 	// NoGraphic completely disables graphic output.
 	NoGraphic bool
 
-	// Daemonize will turn the qemu process into a daemon
-	Daemonize bool
-
 	// Both HugePages and MemPrealloc require the Memory.Size of the VM
 	// to be set, as they need to reserve the memory upfront in order
 	// for the VM to boot without errors.
@@ -3125,10 +3122,6 @@ func (config *Config) appendKnobs() {
 		config.qemuParams = append(config.qemuParams, "--no-shutdown")
 	}
 
-	if config.Knobs.Daemonize {
-		config.qemuParams = append(config.qemuParams, "-daemonize")
-	}
-
 	config.appendMemoryKnobs()
 
 	if config.Knobs.Mlock {

src/runtime/pkg/govmm/qemu/qemu_test.go

@@ -445,13 +445,12 @@ func TestAppendEmptyDevice(t *testing.T) {
 }
 
 func TestAppendKnobsAllTrue(t *testing.T) {
-	var knobsString = "-no-user-config -nodefaults -nographic --no-reboot -daemonize -overcommit mem-lock=on -S"
+	var knobsString = "-no-user-config -nodefaults -nographic --no-reboot -overcommit mem-lock=on -S"
 	knobs := Knobs{
 		NoUserConfig:  true,
 		NoDefaults:    true,
 		NoGraphic:     true,
 		NoReboot:      true,
-		Daemonize:     true,
 		MemPrealloc:   true,
 		FileBackedMem: true,
 		MemShared:     true,