chore: cleanup orphaned content files (#9961)

Co-authored-by: jcanalesluna <56018501+jcanalesluna@users.noreply.github.com>

src/data/roadmaps/rust/content/cli-utilities@2Zyyf9q_CxmOW-z2pipL.md

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-# CLI Utilities
-
-Rust excels at building fast, reliable command-line tools with memory safety and performance. Popular crates include `clap` for argument parsing, `structopt` for derives, and `termion` for terminal control. Rust's tooling ecosystem makes CLI development efficient and robust.
-
-Learn more from the following links:
-
-- [@official@structopt](https://docs.rs/structopt/latest/structopt/)
-- [@official@clap](https://docs.rs/clap/latest/clap/)
-- [@official@Command-line Apps](https://www.rust-lang.org/what/cli/)
-- [@article@Rust CLI Utilities - GitHub](https://github.com/baldwin-sudo/rusty-utils)

src/data/roadmaps/rust/content/ownership-rules--memory-safety@2UQ3AuGkDbT0-54l0rOGM.md

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-# Ownership Rules and Memory Safety
-
-Rust's ownership has three key rules: each value has exactly one owner, only one owner exists at a time, and values are dropped when owners go out of scope. This prevents data races, ensures memory safety without garbage collection, and eliminates common bugs like use-after-free and memory leaks.
-
-Visit the following resources to learn more:
-
-- [@official@What is Ownership?](https://doc.rust-lang.org/book/ch04-01-what-is-ownership.html)
-- [@article@Rust Ownership & Borrowing - Memory Safety Without Garbage](https://webreference.com/rust/ownership/)
-- [@article@What Is Ownership?](https://rust-book.cs.brown.edu/ch04-01-what-is-ownership.html)