Do not log errors #11
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There are 2 places in statsviz where errors can happen, in both we were logging them using
log.It's not ideal since not all users want that.
Furthermore these 2 logs were not particularly useful:
websocket.Upgrade. However when that happens an HTTP error is already returned through the HTTP connection.sendStats()that returned a possible write Error on thewebsocket.Conn. This happens each time the client (browser) is closed and so it's not really an error.