Remove ee/app/models/ee/ci/variable.rb

ee/app/models/ee/ci/variable.rb

-module EE
-  module Ci
-    module Variable
-      extend ActiveSupport::Concern
-
-      prepended do
-        validates(
-          :environment_scope,
-          presence: true,
-          format: { with: ::Gitlab::Regex.environment_scope_regex,
-                    message: ::Gitlab::Regex.environment_scope_regex_message }
-        )
-      end
-
-      def environment_scope=(new_environment_scope)
-        super(new_environment_scope.to_s.strip)
-      end
-    end
-  end
-end