no need to package glibc-source

packaging/AppImage-builder/AppImageBuilder.yml.jinja

@@ -48,7 +48,6 @@ AppDir:
         main
     include:
       - xdg-desktop-portal-kde
-      - glibc-source
       - libgtk-3-0
       - librsvg2-2
       - librsvg2-common