Documentation/block: drop the request.rst file

Documentation/block/request.rst is outdated and should be removed.
Also delete its entry in the block/index.rst file.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20230507182606.12647-1-rdunlap@infradead.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

Documentation/block/index.rst

@@ -18,7 +18,6 @@ Block
    kyber-iosched
    null_blk
    pr
-   request
    stat
    switching-sched
    writeback_cache_control

Documentation/block/request.rst

-============================
-struct request documentation
-============================
-
-Jens Axboe <jens.axboe@oracle.com> 27/05/02
-
-
-.. FIXME:
-   No idea about what does mean - seems just some noise, so comment it
-
-   1.0
-   Index
-
-   2.0 Struct request members classification
-
-       2.1 struct request members explanation
-
-   3.0
-
-
-   2.0
-
-
-
-Short explanation of request members
-====================================
-
-Classification flags:
-
-	=	====================
-	D	driver member
-	B	block layer member
-	I	I/O scheduler member
-	=	====================
-
-Unless an entry contains a D classification, a device driver must not access
-this member. Some members may contain D classifications, but should only be
-access through certain macros or functions (eg ->flags).
-
-<linux/blkdev.h>
-
-=============================== ======= =======================================
-Member				Flag	Comment
-=============================== ======= =======================================
-struct list_head queuelist	BI	Organization on various internal
-					queues
-
-``void *elevator_private``	I	I/O scheduler private data
-
-unsigned char cmd[16]		D	Driver can use this for setting up
-					a cdb before execution, see
-					blk_queue_prep_rq
-
-unsigned long flags		DBI	Contains info about data direction,
-					request type, etc.
-
-int rq_status			D	Request status bits
-
-kdev_t rq_dev			DBI	Target device
-
-int errors			DB	Error counts
-
-sector_t sector			DBI	Target location
-
-unsigned long hard_nr_sectors	B	Used to keep sector sane
-
-unsigned long nr_sectors	DBI	Total number of sectors in request
-
-unsigned long hard_nr_sectors	B	Used to keep nr_sectors sane
-
-unsigned short nr_phys_segments	DB	Number of physical scatter gather
-					segments in a request
-
-unsigned short nr_hw_segments	DB	Number of hardware scatter gather
-					segments in a request
-
-unsigned int current_nr_sectors	DB	Number of sectors in first segment
-					of request
-
-unsigned int hard_cur_sectors	B	Used to keep current_nr_sectors sane
-
-int tag				DB	TCQ tag, if assigned
-
-``void *special``		D	Free to be used by driver
-
-``char *buffer``		D	Map of first segment, also see
-					section on bouncing SECTION
-
-``struct completion *waiting``	D	Can be used by driver to get signalled
-					on request completion
-
-``struct bio *bio``		DBI	First bio in request
-
-``struct bio *biotail``		DBI	Last bio in request
-
-``struct request_queue *q``	DB	Request queue this request belongs to
-
-``struct request_list *rl``	B	Request list this request came from
-=============================== ======= =======================================