Rejects the libaio TODO, as it's slower than not using it.

TODO

@@ -102,10 +102,6 @@ File with the same name will get an extra extension like ".1", ".2".
 
 * Use threads to scan all the disks at the same time.
 
-* Use Async IO for Linux (libaio).
-See thread: https://sourceforge.net/p/snapraid/discussion/1677233/thread/a300a10b/
-Docs at: http://www.fsl.cs.sunysb.edu/~vass/linux-aio.txt
-
 * Create a filesystem snapshot at every sync, and use it in all the other commands
 automatically.
 At the next sync, drop the old snapshot and create a new one.
@@ -129,6 +125,12 @@ Rejected TODO
 
 This is a list of rejected TODO items.
 
+* Use Async IO for Linux (libaio).
+See thread: https://sourceforge.net/p/snapraid/discussion/1677233/thread/a300a10b/
+Docs at: http://www.fsl.cs.sunysb.edu/~vass/linux-aio.txt
+- Implemented for scrub in the "libaio" branch, but it's slower of
+about 20% in my machine.
+
 * Allow to put parity directly into the underline block device without the need
 of any filesystem.
 That would allow to increase a lot the free space for parity.