Remove mail IPC subsystsem

etc/doc.txt

@@ -75,20 +75,12 @@ OPTIONS:
 This app polls the USB controller device for bus events. For many controllers,
 many instances of "usb" should be spawned.
 
-2.6 mailtest (mail subsystem testing app)
-
-OPTIONS:
-  -r -recv (start in receiver mode; will print data to the debug console)
-  -s -send (run in sender mode)
-  -p -payload [string] (give payload when ran as a sender)
-  -pg -procgroup [int] (target process group)
-
-2.7 devices (device management utility)
+2.6 devices (device management utility)
 
 OPTIONS:
   -la -list-all (List all devices available to the system)
 
-2.8 volumes (volume managemnt utility)
+2.7 volumes (volume managemnt utility)
   -e -eject (Eject / remove a volume based on device key)
   -d -device [key] (Device key)
   -l -list (List all volumes)