Best to leave the A/C in place in case you ever plan to resell the car. You will only save around 50lbs and will get minimal gains. If you hell bent on deleting it, take the car to an A/C repair shop and have them evacuate the R134 from the system then bring it home and start removing parts. Before any of this, make sure you can rout a belt around the other accessories without the A/C in place; if you can't you'll have to install and idler to fill the space of the compressor so the belt can be run properly.
Do not just crack open a condenser line and let the refrigerant leak out. It is not safe for you or the environment.
Happy modding,