Remove references to active development

pros-rs is no longer actively maintained, and furthermore this point was originally inaccurate because PROS is also actively maintained.

packages/pros/src/lib.rs

@@ -5,7 +5,6 @@
 //! Advantages over similar libraries or PROS itself:
 //! - Pros-rs has an [`Async executor`](async_runtime) which allows for easy and performant asynchronous code.
 //! - Simulation support with [`pros-simulator`](https://crates.io/crates/pros-simulator) and any interface with it (e.g. [`pros-simulator-gui`](https://github.com/pros-rs/pros-simulator-gui))
-//! - Active development. Pros-rs is actively developed and maintained.
 //! - Pros-rs is a real crate on crates.io instead of a template, or similar. This allows for dependency management with cargo.
 //!
 //! # Usage