[geary] Drop default value of non-automatic property for newer vala

[Rico Tzschichholz <ricotz src gnome org>]

commit d619d99d4c578357f8c3fd34668d9f3975bf03c5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Apr 19 18:05:18 2018 +0200

    Drop default value of non-automatic property for newer vala

 src/engine/api/geary-account-information.vala |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/engine/api/geary-account-information.vala b/src/engine/api/geary-account-information.vala
index 38c1c33..83e6c93 100644
--- a/src/engine/api/geary-account-information.vala
+++ b/src/engine/api/geary-account-information.vala
@@ -142,7 +142,6 @@ public class Geary.AccountInformation : BaseObject {
         // being saved.
         get { return (allow_save_sent_mail() ? _save_sent_mail : true); }
         set { _save_sent_mail = value; }
-        default = true;
     }
 
     // Order for display purposes.