docs/ja_JP/SubmittingPatches: Remove reference to submitting-drivers.rst

Reflect changes made in commit 9db370de

 ("docs: process: remove
outdated submitting-drivers.rst")

Reported-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Fixes: 9db370de

 ("docs: process: remove outdated submitting-drivers.rst")
Cc: Tsugikazu Shibata <shibata@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220818223440.13530-1-akiyks@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>