The unbind() method is optional is usb_composite_driver.
In this particular driver the method does nothing so it can be removed.

Signed-off-by: Andrzej Pietrasiewicz <andrze...@samsung.com>
---
 drivers/usb/gadget/legacy/printer.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/usb/gadget/legacy/printer.c 
b/drivers/usb/gadget/legacy/printer.c
index 6385c19..21ea317 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -1288,11 +1288,6 @@ fail:
        return status;
 }
 
-static int printer_unbind(struct usb_composite_dev *cdev)
-{
-       return 0;
-}
-
 static int __init printer_bind(struct usb_composite_dev *cdev)
 {
        int ret;
@@ -1317,7 +1312,6 @@ static __refdata struct usb_composite_driver 
printer_driver = {
        .strings        = dev_strings,
        .max_speed      = USB_SPEED_SUPER,
        .bind           = printer_bind,
-       .unbind         = printer_unbind,
 };
 
 static int __init
-- 
1.9.1

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