[PATCH 4/6] rust: str: remove unnecessary qualification

[Alice Ryhl]

On Fri, Jul 4, 2025 at 10:16 PM Tamir Duberstein <tamird at gmail.com> wrote:
>
> `core::ffi::*` is in the prelude, which is imported here.
>
> Signed-off-by: Tamir Duberstein <tamird at gmail.com>

Reviewed-by: Alice Ryhl <aliceryhl at google.com>