Domestic violence charges brought against former San Francisco 49ers cornerback Tramaine Brock in Santa Clara County earlier this year were dropped Tuesday due to insufficient evidence, according to prosecutors. The 28-year-old Brock was charged with felony domestic violence in June after police alleged he assaulted his 31-year-old girlfriend following a dispute over what to watch on television, according to the Santa Clara County district attorney’s office. Prosecutors declined to move forward with the case because the victim did not want to cooperate, Sean Webby, a spokesman for the district attorney’s office, said Wednesday morning. The woman had “visible injuries” when officers arrived at Brock’s home in Santa Clara, police said in a statement shortly after he was arrested on April 6. Brock was cut from the 49ers one day after he was arrested on domestic violence charges, the Chronicle reported.