[SPARK-3415] [PySpark] removes SerializingAdapter code

This code removes the SerializingAdapter code that was copied from PiCloud
Basically, couldpickle is on third-party module, so it's better to keep it alone (without depending on other parts of spark).

So I think it's fine to remove these about SerializingAdapter, we could have no size limitation for files.

Also, I had tried to do similar things in PR #2144