block: remove stale kerneldoc member from __blk_run_queue()

We don't pass in a 'force_kblockd' anymore, get rid of the
stsale comment.

Reported-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/block/blk-core.c b/block/blk-core.c
index 40725b9..a2e58ee 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -292,7 +292,6 @@
 /**
  * __blk_run_queue - run a single device queue
  * @q:	The queue to run
- * @force_kblockd: Don't run @q->request_fn directly.  Use kblockd.
  *
  * Description:
  *    See @blk_run_queue. This variant must be called with the queue lock