Revert "Fixes the vending machine bug?"

This reverts commit 63cd2120089e346e9eae15f0c0a5a71795898a65.
Revert "Fix safe...?"

This reverts commit 0762e137ab1abdf3c0dd2a29827259dbc0060460.
Revert "Optimize the fuck out of using checks in machines."

This reverts commit 5649e2c34d4f01c250983751967d3079185fbfc8.

Conflicts:
	code/game/objects/objs.dm