[gnome-builder] po: remove unused files

[Christian Hergert <chergert src gnome org>]

commit 50244493c657e6b9912061c168666d6fcec4c81c
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 3 18:46:59 2020 -0800

    po: remove unused files

 po/POTFILES.in | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 65396e13a..fb595a78b 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -375,8 +375,6 @@ src/plugins/testui/gbp-test-tree-addin.c
 src/plugins/todo/gbp-todo-panel.c
 src/plugins/todo/gbp-todo-workspace-addin.c
 src/plugins/vagrant/gbp-vagrant-runtime-provider.c
-src/plugins/vala-pack/ide-vala-completion-item.vala
-src/plugins/vala-pack/ide-vala-preferences-addin.vala
 src/plugins/valgrind/gtk/menus.ui
 src/plugins/valgrind/valgrind_plugin.py
 src/plugins/vcsui/gbp-vcsui-tree-addin.c