dm: usb: emul: Drop usb_emul_reset()

With the root hub unbinding in usb_stop(), there is no need to do
a Sandbox-specific reset operation. usb_emul_reset() is no longer
used anywhere, drop it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

drivers/usb/emul/usb-emul-uclass.c

@@ -294,14 +294,6 @@ int usb_emul_setup_device(struct udevice *dev, struct usb_string *strings,
 	return 0;
 }
 
-void usb_emul_reset(struct udevice *dev)
-{
-	struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
-
-	plat->devnum = 0;
-	plat->configno = 0;
-}
-
 UCLASS_DRIVER(usb_emul) = {
 	.id		= UCLASS_USB_EMUL,
 	.name		= "usb_emul",

drivers/usb/host/usb-uclass.c

@@ -194,17 +194,6 @@ int usb_stop(void)
 		}
 	}
 
-#ifdef CONFIG_SANDBOX
-	struct udevice *dev;
-
-	/* Reset all enulation devices */
-	ret = uclass_get(UCLASS_USB_EMUL, &uc);
-	if (ret)
-		return ret;
-
-	uclass_foreach_dev(dev, uc)
-		usb_emul_reset(dev);
-#endif
 #ifdef CONFIG_USB_STORAGE
 	usb_stor_reset();
 #endif

include/usb.h

@@ -1067,14 +1067,6 @@ struct usb_generic_descriptor **usb_emul_find_descriptor(
 		struct usb_generic_descriptor **ptr, int type, int index);
 
 /**
- * usb_emul_reset() - Reset all emulators ready for use
- *
- * Clear out any address information in the emulators and make then ready for
- * a new USB scan
- */
-void usb_emul_reset(struct udevice *dev);
-
-/**
  * usb_show_tree() - show the USB device tree
  *
  * This shows a list of active USB devices along with basic information about