Here is an existing post of what is safe to remover, also this guy has created a debloated/light versión, please check the development section, there are good Roma, you need to be rooted for better results.
http://xdaforums.com/showthread.php?t=
Sent from my VS980 4G
Sorry, my bad, here is the complete link: http://xdaforums.com/showthread.php?t=2456974
Sent from my VS980 4G