Remove the fd overload of BlockingSocket::BlockingSocket()
Remove the fd overload of BlockingSocket::BlockingSocket()

Summary: It's not needed

Reviewed By: yfeldblum

Differential Revision: D13993615

fbshipit-source-id: 7e53224d39502b96e13bff352dab778df4782a1c

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly