do away with the static settings

app/models/ee/user.rb

@@ -19,7 +19,7 @@ module EE
 
     module ClassMethods
       def support_bot
-        email = Settings.service_desk.email || "support%s@#{Settings.gitlab.host}"
+        email_pattern = "support%s@#{Settings.gitlab.host}"
 
         unique_internal(where(support_bot: true), 'support-bot', email) do |u|
           u.bio = 'The GitLab support bot'

config/initializers/1_settings.rb

@@ -554,13 +554,6 @@ Settings.webpack.dev_server['enabled'] ||= false
 Settings.webpack.dev_server['host']    ||= 'localhost'
 Settings.webpack.dev_server['port']    ||= 3808
 
-#
-# ServiceDesk settings
-#
-Settings['service_desk'] ||= Settingslogic.new({})
-Settings.service_desk['user'] ||= nil
-Settings.service_desk['email'] ||= nil
-
 #
 # Testing settings
 #