Remove an unnecessary conditional

This PR removes the `if chunks:` conditional and dedents the conditional block, since `if chunks:` is always True. Removing the conditional allows the test coverage fail-under value to increase to 100%; previously it was at 99% because the conditional branch never evaluated to `False`, so branch coverage wasn't complete. >  It's easy to confirm that the condition will always be `True`, even when the string being split is empty: ```pycon >>> "".split("a") [''] >>> bool("".split("a")) True ```