[gtk+] Drop atom apis from the docs

[Matthias Clasen <matthiasc src gnome org>]

commit 75dd3315e6448763428db86f0a9070fa29e47a22
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Dec 13 23:47:51 2017 -0500

    Drop atom apis from the docs
    
    These no longer exist.

 docs/reference/gdk/gdk4-sections.txt |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/docs/reference/gdk/gdk4-sections.txt b/docs/reference/gdk/gdk4-sections.txt
index fd40deb..bf84d33 100644
--- a/docs/reference/gdk/gdk4-sections.txt
+++ b/docs/reference/gdk/gdk4-sections.txt
@@ -407,13 +407,8 @@ gdk_content_formats_get_type
 <TITLE>Properties and Atoms</TITLE>
 <FILE>properties</FILE>
 GdkAtom
-GDK_ATOM_TO_POINTER
-GDK_POINTER_TO_ATOM
 gdk_text_property_to_utf8_list_for_display
 gdk_utf8_to_string_target
-gdk_atom_intern
-gdk_atom_intern_static_string
-gdk_atom_name
 </SECTION>
 
 <SECTION>