message: Send and Sync impl now useless
diff: @@ -248,8 +248,3 @@ impl FastFieldsReader {
  })
  }
  }
  -
  -unsafe impl Send for U64FastFieldReader {}
  -unsafe impl Sync for U64FastFieldReader {}
  -unsafe impl Send for I64FastFieldReader {}
  -unsafe impl Sync for I64FastFieldReader {}
  