Remove 1.8 recipes

Temporary things should be temporary.

It been 10 years since diorite, granite and andesite were added. And it's a great addition.

I understood conversion recipes - devs didn't want to force players to go into unexplored chunks to get granite. I disapproved but I understood. But it's been 10 years. No more need for conversion recipes that make no sense. Why would granite be craftable from diorite and quartz? Why would andesite be craftable from cobblestone and diorite?