Remove uncraftable Create blocks from the Create lootbags

[broman]

The brass encased shaft and brass encased large cogwheel aren't craftable, they're created by using a casing onto a shaft/cogwheel. This PR removes those uncraftable blocks from the loot bag tables

[SubordinalBlue]

One could say that is a kind of crafting, the using of casings. Just like other things are “crafted” not by a crafting table or grid, but by using machines or what not.

[broman]

I should say, you can't obtain them at all. When you break that block you don't get the casing, because no casing was spent when you used it

[SubordinalBlue]

Sure, but that’s not a reason not to have them in loot. They’re still usable and good to learn from.

Or, looked at from another way, they don’t fit the usual common case of “uncraftable”: either an item that is intentionally banned by a modpack, or mistakenly rendered unobtainable by an error in the modpack’s massaging of recipes.