the legs don't look that rooish to me. I would just wait and see. my bantam cochins start crowing at 4-6 weeks so I would think you would be hearing something by now?
DO NOT get rid of him/her just yet!!!!!!!!!! We are all just GUESSING on the sex but non of us are God and s/he may very well be a pullet! I have heard of more than one story about people getting rid of their "rooster" only to later find out he now lays eggs! So until s/he lays an egg or starts crowing, keep it!