Charlie's Former Goddess Bree Olson -- No More Porn, EVER!

Bree Olson hasn't just "moved on" from Charlie Sheen ... the former goddess also says she's given up PORN for good ... and is now taking acting classes so she can go "mainstream."

Olson -- who was critically acclaimed for her work in "Big Wet Asses 10" -- says she hasn't done an adult film in over a year ... and says, "That part of my life is over."