[gtk] docs: Remove <ulink> elements

[Emmanuele Bassi <ebassi src gnome org>]

commit 35e973d6988e6f20e74868bc162078a070fecce4
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Feb 4 09:53:22 2019 +0100

    docs: Remove <ulink> elements
    
    We use Markdown for documentation, not Docbook.

 gdk/gdkpaintable.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/gdk/gdkpaintable.c b/gdk/gdkpaintable.c
index 5e3904e73c..8e808b4913 100644
--- a/gdk/gdkpaintable.c
+++ b/gdk/gdkpaintable.c
@@ -38,10 +38,9 @@ void            gtk_snapshot_pop                        (GdkSnapshot
  * #GdkPaintable is a simple interface used by GDK and GDK to represent
  * objects that can be painted anywhere at any size without requiring any
  * sort of layout. The interface is inspired by similar concepts elsewhere,
- * such as #ClutterContent, <ulink
- * linkend="https://www.w3.org/TR/css-images-4/#paint-source";>HTML/CSS Paint
- * Sources</ulink> or <ulink linkend="https://www.w3.org/TR/SVG2/pservers.html";>
- * SVG Paint Servers</ulink>.
+ * such as [ClutterContent](https://developer.gnome.org/clutter/stable/ClutterContent.html),
+ * [HTML/CSS Paint Sources](https://www.w3.org/TR/css-images-4/#paint-source),
+ * or [SVG Paint Servers](https://www.w3.org/TR/SVG2/pservers.html).
  *
  * A #GdkPaintable can be snapshot at any time and size using
  * gdk_paintable_snapshot(). How the paintable interprets that size and if it