fix(parity-clib-example): remove websocket

[niklasad1]

I suspect there is something wrong with the WebSocket subscription in the light client so let's remove it for now in order not to deny well-formed PRs!

/cc @tomusdrw @ngotchac

[tomusdrw]

@niklasad1 you can subscribe to eth_subscribe(newHeads) @mattrutherford recently changed this so it's emitted even when syncing (see #9987)

[niklasad1]

Thanks @tomusdrw

I found out this yesterday too when I tested it locally,

I was wrong the WebSocket works without being fully synced tested locally now but it seems to some problem with ChainNotify in the light-client sometimes it works and sometimes not. I think I had some problem with it before but has worked locally for me for a while now

Thus, I need to debug if there is something weird with the ChainNotify for the light client (I have not confirmed it yet) and should probably be disabled for the CI to prevent other PRs to fail randomly.

[ngotchac]

LGTM, maybe create an issue to run those tests somewhere else in the near-future so we don't forget?

[tomaka]

I can also be the C++ example or C bindings that have an undefined behaviour, as opposed to the Rust code having a bug.

[niklasad1]

Closing until the error-cause is confirmed which could be UB as @tomaka stated!