Do not use "ide" if there is a disk image and no interface type has been explicitly configured.

gns3server/compute/qemu/qemu_vm.py

@@ -1915,11 +1915,6 @@ class QemuVM(BaseNode):
                 continue
 
             interface = getattr(self, "hd{}_disk_interface".format(drive))
-            # fail-safe: use "ide" if there is a disk image and no interface type has been explicitly configured
-            if interface == "none":
-                interface = "ide"
-                setattr(self, "hd{}_disk_interface".format(drive), interface)
-
             disk_name = "hd" + drive
             if not os.path.isfile(disk_image) or not os.path.exists(disk_image):
                 if os.path.islink(disk_image):