Remove unnecessary requires for gitlab.rb

These are causing warnings about already initialized constants
because the class is loaded twice

config/initializers/2_gitlab.rb

-require_dependency 'gitlab'

config/settings.rb

@@ -3,12 +3,6 @@
 require 'settingslogic'
 require 'digest/md5'
 
-# We can not use `Rails.root` here, as this file might be loaded without the
-# full Rails environment being loaded. We can not use `require_relative` either,
-# as Rails uses `load` for `require_dependency` (used when loading the Rails
-# environment). This could then lead to this file being loaded twice.
-require_dependency File.expand_path('../lib/gitlab', __dir__)
-
 class Settings < Settingslogic
   source ENV.fetch('GITLAB_CONFIG') { Pathname.new(File.expand_path('..', __dir__)).join('config/gitlab.yml') }
   namespace ENV.fetch('GITLAB_ENV') { Rails.env }

scripts/static-analysis

 #!/usr/bin/env ruby
 
 # We don't have auto-loading here
-require_relative '../lib/gitlab'
 require_relative '../lib/gitlab/popen'
 require_relative '../lib/gitlab/popen/runner'