Shadow rs dep (#8298)

# Description

While looking at the recent MR merged, I noticed that a dependency was
no more used with https://github.com/nushell/nushell/pull/8280.

# User-Facing Changes

None.

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/Cargo.toml

@@ -84,7 +84,6 @@ sha2 = "0.10.0"
 percent-encoding = "2.2.0"
 reedline = { version = "0.16.0", features = ["bashisms", "sqlite"] }
 rusqlite = { version = "0.28.0", features = ["bundled"], optional = true }
-shadow-rs = { version = "0.20.0", default-features = false }
 sqlparser = { version = "0.30.0", features = ["serde"], optional = true }
 sysinfo = "0.28.0"
 tabled = "0.10.0"