diff --git a/lib/omniauth/strategies/oauth2.rb b/lib/omniauth/strategies/oauth2.rb
index ad528b2..8836fbd 100644
--- a/lib/omniauth/strategies/oauth2.rb
+++ b/lib/omniauth/strategies/oauth2.rb
@@ -33,10 +33,6 @@ def client
         ::OAuth2::Client.new(options.client_id, options.client_secret, deep_symbolize(options.client_options))
       end
 
-      def callback_url
-        full_host + script_name + callback_path
-      end
-
       credentials do
         hash = {'token' => access_token.token}
         hash.merge!('refresh_token' => access_token.refresh_token) if access_token.expires? && access_token.refresh_token