HID: winwing: Remove unused variable 'minor'

Variable minor is not effectively used, so delete it.

drivers/hid/hid-winwing.c:123:15: warning: variable 'minor' set but not used.

Fixes: 266c990d ("HID: Add WinWing Orion2 throttle support")
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=8705


Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>