The ARCnet documentation contains a lot of outdated and irrelevant information (such as changes in decades-old driver versions and messages from a former maintainer) and has some writing style issues. Remove this unnecessary information and improve the writing style. Also remove links to pages that no longer exist. Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com> Link: https://patch.msgid.link/20260521001631.45434-7-enelsonmoore@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>