[Plugin: Woocommerce] removing shopping functionality safely

I’m just a building a catalog like site, and i want remove all those shopping functionality,i know that the conditional visibility can do that but, it has a lot of other feature that I don’t want and I simply can’t afford it at the moment
deleting out the some line .php might work but if I do that doesn’t it mess up the theme when update happens ? Is it necessary to update themes? If not then I don’t have to worry about the theme getting messed up and I can delete out the necessary lines right?
in GTHub agusmu said that it can be easily done by remove_action function. and we only need to remove some default WC action hooks. So, it is on customization area and he’ll upload a tutorial about it
https://github.com/woothemes/woocommerce/issues/420

so is there any way to safely remove it?