parse-options.h: OPTION_{BIT,SET_INT} do not store pointer to defval

When 20d1c652 (parse-options: remove unused OPT_SET_PTR, 2014-03-30)
removed OPT_SET_PTR, the comment in the header that describes what
the option did to defval field was left behind by mistake.  Remove
it.

Signed-off-by: Ivan Ukhov <ivan.ukhov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/parse-options.h b/parse-options.h
index dd46f88..6d19abd 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -95,8 +95,7 @@
  *
  * `defval`::
  *   default value to fill (*->value) with for PARSE_OPT_OPTARG.
- *   OPTION_{BIT,SET_INT} store the {mask,integer,pointer} to put in
- *   the value when met.
+ *   OPTION_{BIT,SET_INT} store the {mask,integer} to put in the value when met.
  *   CALLBACKS can use it like they want.
  */
 struct option {