let-binding has unit value fix breaks code

Summary

I have got this warning:

warning: this let-binding has unit value
  --> dyn_utils\src\any_store.rs:97:3
   |
97 |         let metadata = std::ptr::metadata(&value);
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `std::ptr::metadata(&value);`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
   = note: `#[warn(clippy::let_unit_value)]` on by default

I tried the auto fixing, but it broke the code:

cargo clippy --fix --lib -p dyn_utils

Lint Name

let_unit_value

Reproducer

I tried this code:

pub struct AnyId<T: ?Sized> {
   metadata: <T as Pointee>::Metadata,
}

pub struct AnyStore {}

impl AnyStore {
   pub fn push<T: 'static>(value: T) -> AnyId<T> {
      let metadata = std::ptr::metadata(&value);
      AnyId {
	   metadata,
      }
   }
}

I saw this happen:

The following errors were reported:
error[E0425]: cannot find value `metadata` in this scope
   --> dyn_utils\src\any_store.rs:111:4
    |
111 |             metadata,
    |             ^^^^^^^^ not found in this scope
    |
help: consider importing one of these items
    |
1   | use core::ptr::metadata;
    |
1   | use std::fs::metadata;
    |
1   | use std::ptr::metadata;
    |

error: aborting due to previous error

For more information about this error, try `rustc --explain E0425`.
Original diagnostics will follow.

warning: this let-binding has unit value
  --> dyn_utils\src\any_store.rs:97:3
   |
97 |         let metadata = std::ptr::metadata(&value);
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `std::ptr::metadata(&value);`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
   = note: `#[warn(clippy::let_unit_value)]` on by default

warning: `dyn_utils` (lib) generated 1 warning (run `cargo clippy --fix --lib -p dyn_utils` to apply 1 suggestion)
    Finished dev [unoptimized + debuginfo] target(s) in 0.48s

Version

rustc 1.71.0-nightly (f9a6b7158 2023-05-05)
binary: rustc
commit-hash: f9a6b71580cd53dd4491d9bb6400f7ee841d9c22
commit-date: 2023-05-05
host: x86_64-pc-windows-msvc
release: 1.71.0-nightly
LLVM version: 16.0.2

Additional Labels

No response

Start by reproducing the issue in dyn_utils/src/any_store.rs with the let_unit_value lint and cargo clippy --fix --lib -p dyn_utils. Inspect how the lint's suggestion turns the binding into a standalone expression, then verify the metadata field still compiles and the original warning is handled without the E0425 error.