By Madeline Coleman Boston rescinded its contract offer to the 20-year-old after receiving significant backlash. The Bruins rocked the hockey world on Friday when they announced the signing of Mitchell Miller, who was initially drafted by the Coyotes in 2020 but was renounced days later after it came to light that Miller bullied a Black classmate with a developmental disability in eighth grade. The hockey prospect and another classmate were charged and convicted at the time in an Ohio Juvenile Court for the bullying, as reported by the Arizona Republic in 2020. By Sunday, the Bruins decided to…