Removed unused init_lists() function that serves no purpose #3854
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Removed init_lists(). It was already marked as unused, so it doesn't generate a warning, but in truth it serves no purpose. The function pre-inits to 4 empty function slots, but the linked-list algorithms work without doing that init, and pre-initing that way has no performance advantage either.
If the function is ever needed in the future, for whatever reason, it can be retrieved from the file history.