Mumford & Sons have issued a statement informing fans that they will not be playing the main stage of the Bonnaroo festival this weekend as bassist Ted Dwane recovers from emergency surgery. The band has also canceled several other upcoming shows. Earlier this week, Dwane underwent surgery to remove a blot clot from his brain. In the statement on their Facebook page, the band posted a message telling fans that Dwane “has been discharged from hospital and is on the road to a full recovery.” They also thanked fans for their compassion and support and promised to “get back out on tour as soon as we can” …