Removed the Support Email setting

This setting was not longer used in GitLab, so i think it can be
removed.
Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

config/gitlab.yml.example

@@ -35,9 +35,6 @@ production: &base
     # Email address used in the "From" field in mails sent by GitLab
     email_from: example@example.com
 
-    # Email address of your support contact (default: same as email_from)
-    support_email: support@example.com
-
     # Email server smtp settings are in [a separate file](initializers/smtp_settings.rb.sample).
 
     ## User settings

config/initializers/1_settings.rb

@@ -79,7 +79,6 @@ Settings.gitlab['port']       ||= Settings.gitlab.https ? 443 : 80
 Settings.gitlab['relative_url_root'] ||= ENV['RAILS_RELATIVE_URL_ROOT'] || ''
 Settings.gitlab['protocol']   ||= Settings.gitlab.https ? "https" : "http"
 Settings.gitlab['email_from'] ||= "gitlab@#{Settings.gitlab.host}"
-Settings.gitlab['support_email']  ||= Settings.gitlab.email_from
 Settings.gitlab['url']        ||= Settings.send(:build_gitlab_url)
 Settings.gitlab['user']       ||= 'git'
 Settings.gitlab['user_home']  ||= begin