Cape Codders no longer need to make appointments to get their COVID-19 vaccines. Vaccination sites across the Cape — including Cape Cod Melody Tent in Hyannis and Cape Cod Fairgrounds in East Falmouth — are now offering shots to walk-ins during clinic hours. The days when Cape Codders had to spend hours online trying to find an appointment have vanished with the winter’s chill. “Walk-ins are available universally. It’s never been easier” to get a shot, state Sen. Julian Cyr, D-Truro, said Thursday morning during a briefing by the Cape Cod COVID-19 Response Task Force. “Now we have ample supplies. You can sign up. You can walk in,” Cyr said.