A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20221212222549.3779846-2-u.kleine-koenig@pengutronix.deSigned-off-by: Florian Fainelli <f.fainelli@gmail.com>