move SqsActiveJob's class methods

lib/aws/rails/sqs_active_job.rb

@@ -14,6 +14,20 @@ module Rails
     # == AWS SQS ActiveJob.
     #
     # SQS-based queuing backend for Active Job.
-    module SqsActiveJob; end
+    module SqsActiveJob
+      # @return [Configuration] the (singleton) Configuration
+      def self.config
+        @config ||= Configuration.new
+      end
+
+      # @yield Configuration
+      def self.configure
+        yield(config)
+      end
+
+      def self.fifo?(queue_url)
+        queue_url.ends_with? '.fifo'
+      end
+    end
   end
 end

lib/aws/rails/sqs_active_job/configuration.rb

@@ -4,20 +4,6 @@ module Aws
   module Rails
     # Configuration for AWS SQS ActiveJob.
     module SqsActiveJob
-      # @return [Configuration] the (singleton) Configuration
-      def self.config
-        @config ||= Configuration.new
-      end
-
-      # @yield Configuration
-      def self.configure
-        yield(config)
-      end
-
-      def self.fifo?(queue_url)
-        queue_url.ends_with? '.fifo'
-      end
-
       # Use +Aws::Rails::SqsActiveJob.config+ to access the singleton config instance.
       class Configuration
         # Default configuration options