Merge branch 'fix/gb/remove-gitlab-ci-module' into 'master'

Remove legacy GitlabCi module from initializers

See merge request !9279

config/initializers/4_ci_app.rb

-module GitlabCi
-  VERSION = Gitlab::VERSION
-  REVISION = Gitlab::REVISION
-
-  def self.config
-    Settings
-  end
-end