Merge PR #303: Remove public/private dependencies from 2024

We decided to remove this from Rust 2024 here:

- rust-lang/rust#44663 (comment)

Author: traviscross

src/SUMMARY.md

@@ -42,7 +42,6 @@
   - [`unsafe_op_in_unsafe_fn` warning](rust-2024/unsafe-op-in-unsafe-fn.md)
   - [RPIT lifetime capture](rust-2024/rpit-lifetime-capture.md)
   - [Disallow references to `static mut`](rust-2024/static-mut-reference.md)
-  - [Public/private dependencies](rust-2024/public-private-dependencies.md)
   - [Cargo: Remove implicit features](rust-2024/cargo-remove-implicit-features.md)
   - [Cargo: Table and key name consistency](rust-2024/cargo-table-key-names.md)
   - [Cargo: Reject unused inherited default-features](rust-2024/cargo-inherited-default-features.md)