[geary/gnumdk/remove_workaround_for_gtk_mr_939] client: composer: Remove workaround for GTK merge request !939

[Cédric Bellegarde <cbellegarde src gnome org>]

commit b2ec31e1c06eec1b794b1ea80243010224cfefae
Author: Cédric Bellegarde <cedric bellegarde adishatz org>
Date:   Sat Jul 9 22:35:15 2022 +0200

    client: composer: Remove workaround for GTK merge request !939

 src/client/composer/contact-entry-completion.vala | 8 --------
 1 file changed, 8 deletions(-)
---
diff --git a/src/client/composer/contact-entry-completion.vala 
b/src/client/composer/contact-entry-completion.vala
index 97e60b264..4d6a350a6 100644
--- a/src/client/composer/contact-entry-completion.vala
+++ b/src/client/composer/contact-entry-completion.vala
@@ -87,14 +87,6 @@ public class ContactEntryCompletion : Gtk.EntryCompletion, Geary.BaseInterface {
         Gtk.ListStore model = (Gtk.ListStore) this.model;
         string completion_key = this.current_key;
         if (!Geary.String.is_empty_or_whitespace(completion_key)) {
-            // Append a placeholder row here if the model is empty to
-            // work around the issue descried in
-            // https://gitlab.gnome.org/GNOME/gtk/merge_requests/939
-            Gtk.TreeIter iter;
-            if (!model.get_iter_first(out iter)) {
-                model.append(out iter);
-            }
-
             this.search_cancellable = new GLib.Cancellable();
             this.search_contacts.begin(completion_key, this.search_cancellable);
         } else {