[gtkmm-documentation] index-in.docbook: Don't try to show removed app_menu.ui file

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 1035d2e5cfc61657cceeacd1e91949ede922ff16
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Jun 5 15:39:21 2020 +0200

    index-in.docbook: Don't try to show removed app_menu.ui file

 docs/tutorial/C/index-in.docbook | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/docs/tutorial/C/index-in.docbook b/docs/tutorial/C/index-in.docbook
index 7396244..076ad4b 100644
--- a/docs/tutorial/C/index-in.docbook
+++ b/docs/tutorial/C/index-in.docbook
@@ -7682,7 +7682,7 @@ Our application is beginning to take shape:
   </screenshot>
 </figure>
 
-<para><ulink url="&url_examples_base;buildapp/step3">Source Code</ulink></para>
+<para><ulink url="&url_examples_base;buildapp/step3">Source Code</ulink></para> <!-- Insert window.ui -->
 
 </sect1>
 
@@ -7730,7 +7730,7 @@ The application menu looks like this:
   </screenshot>
 </figure>
 
-<para><ulink url="&url_examples_base;buildapp/step4">Source Code</ulink></para> <!-- Insert 
exampleapp.gresource.xml app_menu.ui -->
+<para><ulink url="&url_examples_base;buildapp/step4">Source Code</ulink></para> <!-- Insert 
exampleapp.gresource.xml gears_menu.ui window.ui -->
 
 </sect1>
 
@@ -7908,7 +7908,7 @@ What our application looks like now:
   </screenshot>
 </figure>
 
-<para><ulink url="&url_examples_base;buildapp/step7">Source Code</ulink></para> <!-- Insert 
exampleapp.gresource.xml gears_menu.ui window.ui org.gtkmm.exampleapp.gschema.xml -->
+<para><ulink url="&url_examples_base;buildapp/step7">Source Code</ulink></para> <!-- Insert gears_menu.ui 
window.ui org.gtkmm.exampleapp.gschema.xml -->
 
 
 </sect1>