Remove duplicate comments from sysctl.c

Randy Dunlap noticed that the recent comment clarifications from Andrew
had somehow gotten duplicated.  Quoth Andrew: "hm, that could have been
some late-night reject-fixing."

Fix it up.

Cc: From: Andrew Morton <akpm@linux-foundation.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/sysctl.c

@@ -995,10 +995,6 @@ static ctl_table vm_table[] = {
 		.extra1		= &zero,
 	},
 #endif
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
@@ -1143,10 +1139,6 @@ static ctl_table fs_table[] = {
 		.child		= binfmt_misc_table,
 	},
 #endif
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt