diff --git a/railties/lib/rails/deprecation.rb b/railties/lib/rails/deprecation.rb
index 3c5b8bdec7..155166a113 100644
--- a/railties/lib/rails/deprecation.rb
+++ b/railties/lib/rails/deprecation.rb
@@ -15,11 +15,3 @@ RAILS_ROOT = (Class.new(ActiveSupport::Deprecation::DeprecationProxy) do
     ActiveSupport::Deprecation.warn(msg, callstack)
   end
 end).new
-
-module Rails
-  class Configuration
-    def gem(*args)
-      ActiveSupport::Deprecation.warn("config.gem has been deprecated in favor of the Gemfile.")
-    end
-  end
-end
\ No newline at end of file