virt: don't set emulator path

Remove the implicit emulator path from the domain definition. Libvirt is
already configured to use the correct emulator for kvm or qemu and
specifying it creates distro dependence.

Fixes #85

resources/virt.go

@@ -525,9 +525,6 @@ func (obj *VirtRes) getDomainXML() string {
 	b += fmt.Sprintf("</os>")
 
 	b += fmt.Sprintf("<devices>") // start devices
-	// TODO: use capabilities to determine emulator
-	//b += "<emulator>/usr/bin/kvm-spice</emulator>" // TODO: ?
-	b += "<emulator>/usr/bin/qemu-kvm</emulator>"
 
 	if obj.Disk != nil {
 		for i, disk := range obj.Disk {