This is the response I received from NV Gaming

After an in-depth internal review it was determined that publishing the aforementioned information was no longer practicable and it was not mandated by state gaming regulations or laws. It appeared that the primary audience for the published information was for chip and token collectors and members of that community. Although the collection of chips and tokens is not illegal, the Nevada Gaming Control Board does not support that activity and actually prohibits licensees from participating in it. The use of approved gaming instruments like chips and tokens are for gaming and they are not approved as souvenirs and collectibles. Private entities keep records of chips and tokens that are approved and some choose to publish that information on the internet but the Board will no longer publish that information on our website. Historical records were left on our website for convenience, thank you