config.gem warnings?! I don't care, just make it stop ..

Unpacked some gems that will be using for my app, well, i don't want to use system gems for various reasons. But when start the app, got a few warnings come up which is quite annoying

config.gem: Unpacked gem blahblah in vendor/gems has no specification file. Run 'rake gems:refresh_specs' to fix this

To turn it off, just include this line in your environment file before the initialiser config block

Rails::VendorGemSourceIndex.silence_spec_warnings = true