When I use "Save for Web" in Photoshop it adds a bunch of metadata. For example I saved a 4x4 pixel file as PNG. It should have been around 136 bytes put photoshop added 814 extra bytes, all metadata I don't need or want.
How can I prevent Photoshop from adding this metadata?
Note: I know I can use pngcrush or other utilties to remove the metadata after the fact. That's not what I'm asking. I'm asking how to get photoshop to stop adding the data in the first place.