HID: nintendo: Remove some unused functions

These functions are defined in the hid-nintendo.c file, but not called
elsewhere, so delete these unused functions.

drivers/hid/hid-nintendo.c:757:20: warning: unused function 'joycon_type_has_left_controls'.
drivers/hid/hid-nintendo.c:763:20: warning: unused function 'joycon_type_has_right_controls'.

Fixes: 94f18bb1 ("HID: nintendo: add support for nso controllers")
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=8060


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