This commit makes enchanted tools which have no use for
tool_capabilities to not include it in their metadata. It does this by
not including tool_capabilities in the metadata of an enchanted tool if
at least one of two cases is true:
(1) The tool is not enchanted with unbreaking or efficiency
(2) The tool does not have tool_capabilities defined in its definition
The first case covers situations like having a pickaxe only being
enchanted with silk_touch. The second case covers situations like a
piece of armor being enchanted with unbreaking.
573b1dc44b