[gtk+] docs: remove reference to function that doesn't exist

[William Jon McCann <mccann src gnome org>]

commit 07535e968238124cd0ca4e3110b1852c5ee9e769
Author: William Jon McCann <william jon mccann gmail com>
Date:   Mon Jan 20 18:00:28 2014 -0500

    docs: remove reference to function that doesn't exist

 gdk/gdktypes.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdktypes.h b/gdk/gdktypes.h
index f307030..02043a6 100644
--- a/gdk/gdktypes.h
+++ b/gdk/gdktypes.h
@@ -271,8 +271,8 @@ typedef enum
  * @GDK_MODIFIER_INTENT_SHIFT_GROUP: the modifier that switches between keyboard
  *  groups (AltGr on X11/Windows and Option/Alt on OS X).
  *
- * This enum is used with gdk_keymap_get_modifier_mask() and
- * gdk_get_modifier_mask() in order to determine what modifiers the
+ * This enum is used with gdk_keymap_get_modifier_mask()
+ * in order to determine what modifiers the
  * currently used windowing system backend uses for particular
  * purposes. For example, on X11/Windows, the Control key is used for
  * invoking menu shortcuts (accelerators), whereas on Apple computers