rust: alloc: remove VecExt extension

Now that all existing `Vec` users were moved to the kernel `Vec` type,
remove the `VecExt` extension.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20240816001216.26575-18-dakr@kernel.org

Author: Danilo Krummrich

rust/kernel/alloc.rs

@@ -6,7 +6,6 @@
 pub mod allocator;
 pub mod kbox;
 pub mod kvec;
-pub mod vec_ext;
 
 #[cfg(any(test, testlib))]
 pub mod allocator_test;

rust/kernel/alloc/vec_ext.rs

@@ -14,10 +14,7 @@
 #[doc(no_inline)]
 pub use core::pin::Pin;
 
-pub use crate::alloc::{flags::*, vec_ext::VecExt, Box, KBox, KVBox, KVVec, KVec, VBox, VVec};
-
-#[doc(no_inline)]
-pub use alloc::vec::Vec;
+pub use crate::alloc::{flags::*, Box, KBox, KVBox, KVVec, KVec, VBox, VVec};
 
 #[doc(no_inline)]
 pub use macros::{module, pin_data, pinned_drop, vtable, Zeroable};