[releng] remove gnome-themes-extra from core

[Jordan Petridis <jpetridis src gnome org>]

commit 53dad7b3f3acff3b921f9a86aabf2b1dfa63e450
Author: Jordan Petridis <jpetridis gnome org>
Date:   Thu Apr 30 18:45:31 2020 +0300

    remove gnome-themes-extra from core
    
    https://gitlab.gnome.org/GNOME/gnome-build-meta/-/merge_requests/599

 tools/smoketesting/tarball-conversion.config | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/tools/smoketesting/tarball-conversion.config b/tools/smoketesting/tarball-conversion.config
index 97dbedb..c08c033 100644
--- a/tools/smoketesting/tarball-conversion.config
+++ b/tools/smoketesting/tarball-conversion.config
@@ -83,7 +83,6 @@
     <package name="gnome-settings-daemon"       set="core"/>
     <package name="gnome-shell"                 set="core"/>
     <package name="gnome-shell-extensions"      set="core"/>
-    <package name="gnome-themes-extra"          set="core"/>
     <package name="gsettings-desktop-schemas"   set="core"/>
     <package name="gvfs"                        set="core"/>
     <package name="glib-networking"             set="core"/>