Removing a protection from the state constitution changes nothing, directly. It means that a subsequent law outlawing abortion could not be struck down in state court, because it wouldn’t violate the state constitution.
Such an abortion ban would still violate the US Constitution, as set in Roe vs Wade, but that’s a matter for the federal courts. This could be just a complex venue shopping scheme to get future Iowa laws directly into federal court without spending time in state courts first.
I’m sorta surprised that the Iowa constitution can be changed by a bill in the legislature, as in most states voters would have to vote for such a change. Maybe some Iowan can explain that aspect.
Latest Answers