[pygobject] Doc: Remove reference to a fixed bug

[Christoph Reiter <creiter src gnome org>]

commit 4f4dab428ac5d077f5a6992c21c55eb5266b78f8
Author: Christian Stadelmann <dev genodeftest de>
Date:   Sat Jan 25 15:12:33 2020 +0100

    Doc: Remove reference to a fixed bug

 docs/guide/api/basic_types.rst | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/docs/guide/api/basic_types.rst b/docs/guide/api/basic_types.rst
index b41fee91..6248f942 100644
--- a/docs/guide/api/basic_types.rst
+++ b/docs/guide/api/basic_types.rst
@@ -40,9 +40,6 @@ Platform String Types
 * Unix + Python 2: :obj:`str`
 * Unix + Python 3: :obj:`str`
 
-On Python 3 there is currently no support for :obj:`bytes`, see `bug 746564
-<https://bugzilla.gnome.org/show_bug.cgi?id=746564>`__ for more details.
-
 
 Other Types
 -----------