message: Cut D support from assorted .thrift files
  Summary: Cut D support from assorted .thrift files.
diff: namespace java com.facebook.fb303.core
  namespace java.swift com.facebook.swift.fb303.core
  namespace cpp facebook.fb303
  -namespace d fb303
  namespace py.asyncio fb303_asyncio.fb303_core
  namespace py.twisted fb303_twisted.fb303_core
  namespace perl fb303
  