docs: ko_KR: howto: remove reference to removed submitting-drivers

The document submitting-drivers.rst was deleted. This removes the
corresponding reference in the Korean translation of the howto.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-10-lukas.bulwahn@gmail.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>