Seems like the kind of thing that should have no trouble getting rubber-stamped every few years.
Lets invert that though.
In 1615 Iceland passed a law stating that any Basque that set foot in the Westfjords /must/ be killed. They got around to abolishing it in 2015.
Seems like the sort of thing that probably should have been revoked earlier, no?
More generally, most countries legal codes are a god damn shitshow of strata so dense it takes years to decades of study to understand them even a little.
As a result, rulings are arbitrary and hard to predict, citizens are uninformed on the law and can be blindsided by vindictive police, new laws are disproportionately hard to create due to conflict resolution with old laws being required and parliaments enshrine old laws in tradition and are lothe to amend them.
In general, it's the legal equivalent of that codebase that no one is willing to change because no one remembers why things were implemented in the first place.
Lets not pretend that adding expiry clauses to existing or new laws would lead to a world where murder is legal. That'll get tracked pretty closely and refreshed on the regular. I would expect two outcomes:
1. A government department is created specifically for the purpose of tracking and ranking upcoming law expiries by importance. We should probably have something like this already.
2. For the things society holds really dear, murder/rape/assault, taxes, driving laws etc, I would expect to see a regular "refresh the core issues" session at the start of every year. Essentially a formality where the government can go "yep, torture is still bad, moving on".
However, I'd expect most of the random statutes against oral sex that are still all across the US to expire pretty quickly with lawmakers by and large not giving enough of a shit to refresh them, and that's /good/. Those laws serve no meaningful purpose, their only use is as a weapon for corrupt police to threaten average citizens with.