* remove a 'ERROR' comment from `borrow`
`Vec<AtomicUsize>` itself is `Freeze` as it holds the atomic in heap
* remove `ONCE_INIT` from `declare`
it seems like an artifact from previous spliting
* stop linting associated types and generic type parameters
* start linting ones in trait impls
whose corresponding definitions in the traits are generic
* remove the `is_copy` check
as presumably the only purpose of it is to allow
generics with `Copy` bounds as `Freeze` is internal
and generics are no longer linted
* remove the term 'copy' from the tests
as being `Copy` no longer have meaning
