Fix logging string in a Worker environment sent back to main thread

I noticed that when logs were produced Worker-side then sent back to the
main thread - something only possible under `__RX_PLAYER_DEBUG_MODE__`
(which I would guess is for now only used by our `RxPaired` remote debugger
and our closed-source html logger) - they repeated the timestamp
and level on the log message itself, even in a `standard` `LogFormat`
(whereas this behavior looks like the one under the `full` `LogFormat`).

I don't remember what the idea was, but it seems unnecessary, even under
a `full` `LogFormat`, the supplementary timestamp and level
information would be added on main thread anyway.

The only advantage I can think of is that here we also were having a
worker-side timestamp, which would be more precize on when the log has
been produced. I'm however not sure we would need this.

src/utils/logger.ts

@@ -142,7 +142,7 @@ export default class Logger extends EventEmitter<ILoggerEvents> {
         return level >= this._levels[logLevel]
           ? (...args: IAcceptedLogValue[]) => {
               const now = getMonotonicTimeStamp();
-              return logFn(logLevel, [now, namespace, ...args]);
+              return logFn(logLevel, args);
             }
           : noop;
       };