Remove warnings "method redefined"

lib/omniauth/strategy.rb

@@ -13,8 +13,6 @@ def self.included(base)
 
       base.extend ClassMethods
       base.class_eval do
-        attr_reader :app, :env, :options, :response
-
         option :setup, false
         option :skip_info, false
       end
@@ -106,6 +104,8 @@ def compile_stack(ancestors, method, context)
       end
     end
 
+    attr_reader :app, :env, :options, :response
+
     # Initializes the strategy by passing in the Rack endpoint,
     # the unique URL segment name for this strategy, and any
     # additional arguments. An `options` hash is automatically