Remove incorrect param in UserSocket example

[svileng]

I recently submitted a PR with an example how to migrate UserSocket to Guardian 1.0.

However, I noticed that I put one parameter in the wrong place (the timeout param is actually for the transport, no the channel). I decided to remove it altogether from the example, since it's an optional param that not everyone needs.

[doomspork]

Thank you @svileng, good catch 👍