* safe.c: removed needless doc related $SAFE=2

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50962 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Jun 18 23:45:11 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* safe.c: removed needless doc related $SAFE=2
+
 Thu Jun 18 23:38:07 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* thread.c (rb_thread_safe_level): fix document.  $SAFE=3 is obsolete.

safe.c

@@ -12,7 +12,6 @@
 /* safe-level:
    0 - strings from streams/environment/ARGV are tainted (default)
    1 - no dangerous operation by tainted value
-   2 - process/file operations prohibited
 */
 
 #define SAFE_LEVEL_MAX RUBY_SAFE_LEVEL_MAX