uefi_std: Remove core prelude items

The core prelude is automatically available in all crates and does not
need to be re-exported.

Leave the alloc re-exports that are available from the std prelude, as
the std prelude is not available but these types are commonly used in
Rust code.

Signed-off-by: Tim Crawford <[email protected]>

crates/uefi_std/src/prelude.rs

@@ -1,34 +1,7 @@
 pub use uefi::prelude::*;
 
-/* This section was addapted from the Rust Standard Library, and is licensed accordingly
- * https://raw.githubusercontent.com/rust-lang/rust/master/src/libstd/prelude/v1.rs
- * {
- */
-
-// Re-exported core operators
-#[doc(no_inline)]
-pub use core::marker::{Send, Sized, Sync, Unpin};
-#[doc(no_inline)]
-pub use core::ops::{Drop, Fn, FnMut, FnOnce};
-
-// Re-exported functions
-#[doc(no_inline)]
-pub use core::mem::drop;
-
-// Re-exported types and traits
-#[doc(no_inline)]
-pub use core::convert::{AsMut, AsRef, From, Into};
-#[doc(no_inline)]
-pub use core::iter::{DoubleEndedIterator, ExactSizeIterator};
-#[doc(no_inline)]
-pub use core::iter::{Extend, IntoIterator, Iterator};
-#[doc(no_inline)]
-pub use core::option::Option::{self, None, Some};
-
-// The file so far is equivalent to src/libcore/prelude/v1.rs,
-// and below to src/liballoc/prelude.rs.
-// Those files are duplicated rather than using glob imports
-// because we want docs to show these re-exports as pointing to within `std`.
+// These common items exist in alloc and are exported by the std prelude.
+// https://doc.rust-lang.org/stable/std/prelude/index.html
 
 #[doc(no_inline)]
 pub use alloc_crate::borrow::ToOwned;
@@ -42,5 +15,3 @@ pub use alloc_crate::string::{String, ToString};
 pub use alloc_crate::vec;
 #[doc(no_inline)]
 pub use alloc_crate::vec::Vec;
-
-/* } */