[PATCH 2/2] rust: str: clean unused import for Rust >= 1.98

[Miguel Ojeda <ojeda@kernel.org>]

Starting with Rust 1.98.0 (expected 2026-08-20), the compiler has changed
how the resolution algorithm works [1][2] in upstream commit c4d84db5f184
("Resolver: Batched import resolution."), and it now spots:

    error: unused import: `flags::*`
     --> rust/kernel/str.rs:7:9
      |
    7 |         flags::*,
      |         ^^^^^^^^
      |
      = note: `-D unused-imports` implied by `-D warnings`
      = help: to override `-D warnings` add `#[allow(unused_imports)]`

It happens to not be needed because the `prelude::*` already provides
the flags.

Thus clean it up.

Cc: stable@vger.kernel.org # Needed in 6.18.y and later (prelude added to `str`).
Link: https://github.com/rust-lang/rust/pull/145108 [1]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
 rust/kernel/str.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index 4eae05e4baf9..b3caa9a1c898 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -4,7 +4,6 @@
 
 use crate::{
     alloc::{
-        flags::*,
         AllocError,
         KVec, //
     },
-- 
2.54.0