docs: block: remove queue-sysfs.rst

This has been replaced by Documentation/ABI/stable/sysfs-block, which is
the correct place for sysfs documentation.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20211209003833.6396-8-ebiggers@kernel.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

Documentation/block/index.rst

@@ -20,7 +20,6 @@ Block
    kyber-iosched
    null_blk
    pr
-   queue-sysfs
    request
    stat
    switching-sched