[four-in-a-row] Remove double buffer disabling (bgo#765020)

[Robert Roth <robertroth src gnome org>]

commit 4874734fa38e7f44c783bec6978bfa4a9b6019a4
Author: Robert Roth <robert roth off gmail com>
Date:   Thu Nov 2 15:13:01 2017 +0200

    Remove double buffer disabling (bgo#765020)

 src/main.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 0859d54..b71629e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1160,9 +1160,6 @@ create_app (GApplication *app, gpointer user_data)
   g_signal_connect (G_OBJECT (window), "key_press_event",
                     G_CALLBACK (on_key_press), NULL);
 
-  /* We do our own double-buffering. */
-  gtk_widget_set_double_buffered (GTK_WIDGET (drawarea), FALSE);
-
   g_simple_action_set_enabled (G_SIMPLE_ACTION (hint_action), FALSE);
   g_simple_action_set_enabled (G_SIMPLE_ACTION (undo_action), FALSE);
 }