[PATCH] remove stale comments above struct page

From: Christoph Hellwig <hch@lst.de>

struct page easily fits into a single cacheline with any recent CPU, and the
ordering isn't as described anymore anyway.

include/linux/mm.h

@@ -189,13 +189,6 @@ typedef unsigned long page_flags_t;
  * it to keep track of whatever it is we are using the page for at the
  * moment. Note that we have no way to track which tasks are using
  * a page.
- *
- * Try to keep the most commonly accessed fields in single cache lines
- * here (16 bytes or greater).  This ordering should be particularly
- * beneficial on 32-bit processors.
- *
- * The first line is data used in page cache lookup, the second line
- * is used for linear searches (eg. clock algorithm scans). 
  */
 struct page {
 	page_flags_t flags;		/* Atomic flags, some possibly