Documentation/filesystems/vfs.txt: remove bogus "Last updated" date

This file has actually been updated over 100 times since the claimed
"Last updated" date.

Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Al Viro <[email protected]>

Author: ebiggers

Documentation/filesystems/vfs.txt

@@ -3,8 +3,6 @@
 
 	Original author: Richard Gooch <[email protected]>
 
-		  Last updated on June 24, 2007.
-
   Copyright (C) 1999 Richard Gooch
   Copyright (C) 2005 Pekka Enberg