media: Revert "media: em28xx: add missing em28xx_close_extension"

This reverts commit 2c98b8a3.

Reverted patch causes problems with Hauppauge WinTV dualHD as Maximilian
reported [1]. Since quick solution didn't come up let's just revert it
to make this device work with upstream kernels.

Link: https://lore.kernel.org/all/6a72a37b-e972-187d-0322-16336e12bdc5@elbmurf.de/ [1]
Reported-by: NMaximilian Böhm <maximilian.boehm@elbmurf.de>
Tested-by: NMaximilian Böhm <maximilian.boehm@elbmurf.de>
Signed-off-by: NPavel Skripkin <paskripkin@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/em28xx/em28xx-cards.c

@@ -4150,11 +4150,8 @@ static void em28xx_usb_disconnect(struct usb_interface *intf)
 
 	em28xx_close_extension(dev);
 
-	if (dev->dev_next) {
-		em28xx_close_extension(dev->dev_next);
+	if (dev->dev_next)
 		em28xx_release_resources(dev->dev_next);
-	}
-
 	em28xx_release_resources(dev);
 
 	if (dev->dev_next) {