Ultimately they should be unnecessary now that upstream's fix has been
in place for a while. Removing this reduces our own footprint, and gets
rid of any possible unintended behavior.
ItemMeta apply is a destructive process that expects to be the authority on
what the items NBT data is.
When CraftItemStack.asNMSCopy was called, the conversion ran, potentially setting
the converted data into the ItemStacks tag.
Then if that item had ItemMeta, it would completely undo that conversion by
erasing the NBT Tag.
On copy, run conversion post ItemMeta apply.