[geary/cherry-pick-1ea56782] Remove unused functions

[Michael Gratton <mjog src gnome org>]

commit 663958d06029ca00b408de8792dea770219a3c27
Author: Michael Gratton <mike vee net>
Date:   Sun Sep 29 12:31:51 2019 +1000

    Remove unused functions

 src/engine/app/app-draft-manager.vala | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/src/engine/app/app-draft-manager.vala b/src/engine/app/app-draft-manager.vala
index df41305c..112a17d0 100644
--- a/src/engine/app/app-draft-manager.vala
+++ b/src/engine/app/app-draft-manager.vala
@@ -477,11 +477,4 @@ public class Geary.App.DraftManager : BaseObject {
         return "%s DraftManager".printf(account.to_string());
     }
 
-    private async void save_draft(EmailIdentifier id) {
-
-    }
-
-    private async void remove_draft(EmailIdentifier id) {
-
-    }
 }