Revert "Merge branch 'fix-email-threading' into 'master'"

This reverts commit 97fd990ecde387290be269ef7daafa5761f94af6, reversing
changes made to f451a697e0c018359e6d8ff3aaba4eb0484c4bee.

Conflicts:
	app/mailers/emails/notes.rb
	app/mailers/emails/projects.rb

1 files changed, 16 insertions, 16 deletions

diff --git a/app/mailers/emails/merge_requests.rb b/app/mailers/emails/merge_requests.rb
index c4ca3a3b69b..ea5671c4502 100644
--- a/app/mailers/emails/merge_requests.rb
+++ b/app/mailers/emails/merge_requests.rb
@@ -4,10 +4,10 @@ module Emails
       @merge_request = MergeRequest.find(merge_request_id)
       @project = @merge_request.project
       @target_url = project_merge_request_url(@project, @merge_request)
-      mail_new_thread(@merge_request,
-                      from: sender(@merge_request.author_id),
-                      cc: recipient(recipient_id),
-                      subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
+      set_message_id("merge_request_#{merge_request_id}")
+      mail(from: sender(@merge_request.author_id),
+           to: recipient(recipient_id),
+           subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
     end
 
     def reassigned_merge_request_email(recipient_id, merge_request_id, previous_assignee_id, updated_by_user_id)
@@ -15,10 +15,10 @@ module Emails
       @previous_assignee = User.find_by(id: previous_assignee_id) if previous_assignee_id
       @project = @merge_request.project
       @target_url = project_merge_request_url(@project, @merge_request)
-      mail_answer_thread(@merge_request,
-                         from: sender(updated_by_user_id),
-                         cc: recipient(recipient_id),
-                         subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
+      set_reference("merge_request_#{merge_request_id}")
+      mail(from: sender(updated_by_user_id),
+           to: recipient(recipient_id),
+           subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
     end
 
     def closed_merge_request_email(recipient_id, merge_request_id, updated_by_user_id)
@@ -26,20 +26,20 @@ module Emails
       @updated_by = User.find updated_by_user_id
       @project = @merge_request.project
       @target_url = project_merge_request_url(@project, @merge_request)
-      mail_answer_thread(@merge_request,
-                         from: sender(updated_by_user_id),
-                         cc: recipient(recipient_id),
-                         subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
+      set_reference("merge_request_#{merge_request_id}")
+      mail(from: sender(updated_by_user_id),
+           to: recipient(recipient_id),
+           subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
     end
 
     def merged_merge_request_email(recipient_id, merge_request_id, updated_by_user_id)
       @merge_request = MergeRequest.find(merge_request_id)
       @project = @merge_request.project
       @target_url = project_merge_request_url(@project, @merge_request)
-      mail_answer_thread(@merge_request,
-                         from: sender(updated_by_user_id),
-                         cc: recipient(recipient_id),
-                         subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
+      set_reference("merge_request_#{merge_request_id}")
+      mail(from: sender(updated_by_user_id),
+           to: recipient(recipient_id),
+           subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
     end
   end