[BLOCK] new block/ directory comment tidy

Some leftover comments referring to drivers/block that are now block/.
They don't add any information we don't already have, so kill them.

Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/block/as-iosched.c b/block/as-iosched.c
index a78e160..fbe0501 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/as-iosched.c
- *
  *  Anticipatory & deadline i/o scheduler.
  *
  *  Copyright (C) 2002 Jens Axboe <axboe@suse.de>
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 2b64f58..ee0bb41 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/cfq-iosched.c
- *
  *  CFQ, or complete fairness queueing, disk scheduler.
  *
  *  Based on ideas from a previously unfinished io
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 7929471..9cbec09 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/deadline-iosched.c
- *
  *  Deadline i/o scheduler.
  *
  *  Copyright (C) 2002 Jens Axboe <axboe@suse.de>
diff --git a/block/elevator.c b/block/elevator.c
index e4c5882..6c3fc8a 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/elevator.c
- *
  *  Block device elevator/IO-scheduler.
  *
  *  Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 5f52e30..99c9ca6 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/ll_rw_blk.c
- *
  * Copyright (C) 1991, 1992 Linus Torvalds
  * Copyright (C) 1994,      Karl Keyte: Added support for disk statistics
  * Elevator latency, (C) 2000  Andrea Arcangeli <andrea@suse.de> SuSE