By Joseph Salvador Murray scrubbed all mentions of the Cardinals from his Twitter and Instagram on Monday. Kyler Murray‘s social media activity—or lack thereof—has caused significant uncertainty for the Cardinals in the last couple of days. Whatever comes of the star quarterback’s decision to scrub the team from his social media, it could determine what another key player for Arizona decides this offseason. Christian Kirk, who is set to be an unrestricted free agent this offseason, addressed his future in Arizona on Tuesday. He noted he has not been on social media recently, but heard that his…