testcombo—Don’t set appears-as-list style property

List mode no longer exists, so this had no effect.

tests/testcombo.c

@@ -1063,20 +1063,6 @@ main (int argc, char **argv)
 	if (g_getenv ("RTL"))
 	  gtk_widget_set_default_direction (GTK_TEXT_DIR_RTL);
 
-	if (g_getenv ("LISTMODE"))
-	  {
-	    GtkCssProvider *provider = gtk_css_provider_new ();
-
-	    gtk_css_provider_load_from_data (provider,
-					     "* { -GtkComboBox-appears-as-list: true; }", 
-					     -1);
-
-	    gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
-						       GTK_STYLE_PROVIDER (provider),
-						       GTK_STYLE_PROVIDER_PRIORITY_FALLBACK);
-
-	  }
-
         window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
         g_signal_connect (window, "destroy", gtk_main_quit, NULL);