Amanda Bynes, a former child star known for her roles in Nickelodeon shows such as All That and The Amanda Show, was reportedly approached to share her story on the documentary Quiet On Set: The Dark Side of Kids TV, RadarOnline.com has learned. According to TMZ, the 37-year-old actress and her parents were all asked to participate but opted out, citing their desire to stay out of the spotlight. The documentary delves into the untold stories of the toxic and abusive environment within ’90s kids TV from the perspective of former child stars and crew members. An insider told the outlet that Byne…