Mark Hoppus has undergone surgery to remove his chemo port. The Blink-182 rocker revealed last month he was in remission after spending three months being treated for stage 4 diffuse large B-cell lymphoma and so now the cancer treatment is complete, the 49-year-old singer has had the device – which was attached to a vein to help with administering chemotherapy drugs – taken out of his body. Alongside a selfie, in which part of his face was covered with a mask, Mark tweeted: “In the waiting room for the surgery to remove my chemo port!” The ‘All the Small Things’ hitmaker also shared a series o…