tests: Drop manual property editor

No need for this anymore, now that we have the inspector everywhere.

tests/testrecentchooser.c

@@ -35,8 +35,6 @@
 # endif
 #endif
 
-#include "prop-editor.h"
-
 static void
 print_current_item (GtkRecentChooser *chooser)
 {
@@ -169,8 +167,6 @@ main (int   argc,
 
   gtk_widget_show_all (dialog);
 
-  create_prop_editor (G_OBJECT (dialog), GTK_TYPE_RECENT_CHOOSER);
-
   control_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 
   vbbox = gtk_button_box_new (GTK_ORIENTATION_VERTICAL);