docs: Tweak X11 section

Remove unsupported heading anchors.

diff --git a/docs/reference/gtk/x11.md b/docs/reference/gtk/x11.md
index 675e9e60614711222df634810c4e329aabb1027c..2946747deefa52e86357096d72bc18e27833e87a 100644 (file)
--- a/docs/reference/gtk/x11.md
+++ b/docs/reference/gtk/x11.md
@@ -8,7 +8,7 @@ To mix low-level Xlib routines into a GTK program, see
 [GDK X Window System interaction](#gdk-X-Window-System-Interaction)
 in the GDK manual.
 
-## X11-specific environment variables {#x11-envar}
+## X11-specific environment variables
 :
 The X11 GDK backend can be influenced with some additional environment variables.