block: drop removed argument from kernel-doc of blk_execute_rq()

Commit 684da762 ("block: remove unnecessary argument from
blk_execute_rq") changes the signature of blk_execute_rq(), but misses
to adjust its kernel-doc.

Hence, make htmldocs warns on ./block/blk-exec.c:78:

  warning: Excess function parameter 'q' description in 'blk_execute_rq'

Drop removed argument from kernel-doc of blk_execute_rq() as well.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Guoqing Jiang <Guoqing.jiang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-exec.c

@@ -65,7 +65,6 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
 
 /**
  * blk_execute_rq - insert a request into queue for execution
- * @q:		queue to insert the request in
  * @bd_disk:	matching gendisk
  * @rq:		request to insert
  * @at_head:    insert request at head or tail of queue