Democratic co-sponsors have withdrawn, but an Assembly committee is considering legislation doing away with the work permit now needed by 16- and 17-year-old workers. The bill is aimed at homeless and unaccompanied minors who would have a hard time getting a parent or guardian to sign the permit.  Republican Representative Amy Loudenbeck says she thinks the bill she is co-sponsoring would help those youth be more independent and self-supporting.  Democrats say they would be on board if it only applied to homeless and unaccompanied youth.