That law was removed in the 19th century in general and in the 1960s where there was a specific local requirement, mostly left over from the Marcher Lords.
There was also a victorian case in which a totally ignored law was ruled as inoperable because literally no one in the court was obeying it (not even the person who brought the prosecution, which was blatantly malicious) and virtually no-one in the country was, and there had been no prosecutions for centuries.
