[geary/mjog/rfc822-cleanup: 4/21] Geary.ComposedEmail: Remove to_rfc822_message, it's redundant

[Michael Gratton <mjog src gnome org>]

commit 97e0093e29f07cd2eb0ef928c1e62e95a739afa8
Author: Michael Gratton <mike vee net>
Date:   Tue May 5 21:24:06 2020 +1000

    Geary.ComposedEmail: Remove to_rfc822_message, it's redundant
    
    Callers can just call the same thing that method does instead.

 src/client/composer/composer-widget.vala | 4 +++-
 src/engine/api/geary-composed-email.vala | 7 -------
 2 files changed, 3 insertions(+), 8 deletions(-)
---
diff --git a/src/client/composer/composer-widget.vala b/src/client/composer/composer-widget.vala
index a2186d7ce..3e95f1505 100644
--- a/src/client/composer/composer-widget.vala
+++ b/src/client/composer/composer-widget.vala
@@ -1771,7 +1771,9 @@ public class Composer.Widget : Gtk.EventBox, Geary.BaseInterface {
         if (this.draft_manager != null) {
             Geary.ComposedEmail draft = yield get_composed_email(null, true);
             yield this.draft_manager.update(
-                yield draft.to_rfc822_message(null, null),
+                yield new Geary.RFC822.Message.from_composed_email(
+                    draft, null, null
+                ),
                 null,
                 null
             );
diff --git a/src/engine/api/geary-composed-email.vala b/src/engine/api/geary-composed-email.vala
index 72f30ba80..5c3e27d88 100644
--- a/src/engine/api/geary-composed-email.vala
+++ b/src/engine/api/geary-composed-email.vala
@@ -123,13 +123,6 @@ public class Geary.ComposedEmail : EmailHeaderSet, BaseObject {
         return this;
     }
 
-    public async Geary.RFC822.Message to_rfc822_message(string? message_id,
-                                                        GLib.Cancellable? cancellable) {
-        return yield new RFC822.Message.from_composed_email(
-            this, message_id, cancellable
-        );
-    }
-
     /**
      * Determines if an IMG SRC value is present in the HTML part.
      *