remove the notification_email_top customization

app/mailers/user_notifications.rb

@@ -233,14 +233,11 @@ class UserNotifications < ActionMailer::Base
       end
     end
 
-    top = SiteText.text_for(:notification_email_top)
-
     html = UserNotificationRenderer.new(Rails.configuration.paths["app/views"]).render(
       template: 'email/notification',
       format: :html,
       locals: { context_posts: context_posts,
                 post: post,
-                top: top ? PrettyText.cook(top).html_safe : nil,
                 classes: RTL.new(user).css_class
       }
     )

app/models/site_text.rb

@@ -18,7 +18,6 @@ class SiteText < ActiveRecord::Base
   add_text_type :top, allow_blank: true, format: :html
   add_text_type :bottom, allow_blank: true, format: :html
   add_text_type :head, allow_blank: true, format: :html
-  add_text_type :notification_email_top, allow_blank: true, format: :markdown
 
   def site_text_type
     @site_text_type ||= SiteText.find_text_type(text_type)

app/views/email/notification.html.erb

@@ -1,10 +1,5 @@
 <div id='main' class=<%= classes %>>
 
-<% if top.present? %>
-  <div><%= top %></div>
-  <hr>
-<% end %>
-
 <%= render :partial => 'email/post', :locals => {:post => post} %>
 
 <% if context_posts.present? %>

config/locales/server.en.yml

@@ -626,9 +626,6 @@ en:
     bottom:
       title: "Bottom of the pages"
       description: "HTML that will be added at the bottom of every page."
-    notification_email_top:
-      title: "Notification Email Top"
-      description: "A message that will be displayed at the top of all notification emails."
 
   site_settings:
     censored_words: "Words that will be automatically replaced with ■■■■"