Documentation: drop more IDE boot options and ide-cd.rst

Drop ide-* command line options.
Drop cdrom/ide-cd.rst documentation.

Fixes: 898ee22c ("Drop Documentation/ide/")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20220424033701.7988-1-rdunlap@infradead.org


[jc: also deleted reference from cdrom/index.rst]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>