A popular potato chip brand is leaving its coastal hometown after more than four decades of operations — but its signature name will remain. The Campbell’s Co. announced that it was closing the Cape Cod chip plant in Hyannis, Massachusetts, according to a Jan. 29 news release.  The brand was founded in Hyannis — a beach town known for its association with the Kennedys — and the plant, which will end production in April, has been in use since 1985. The production of Cape Cod chips will “be