The mayor of San Antonio, Texas has called for Kanye West's concert in the city to be cancelled.The controversial rapper's comeback tour this summer in support of his new album Bully has been blighted by cancellations - including three nights at London's Wireless Festival and gigs in Switzerland, Poland, and France - following a huge backlash over his previous anti-semitic comments.He's planning to take the tour to Texas with a huge show at San Antonio's Alamodome venue on America's Independence Day - July 4 - but Mayor Gina Ortiz Jones is adamant the concert should not go ahead. In a...