Update posts/2025-01-09-Rust-1.84.0.md

Co-authored-by: Josh Triplett <josh@joshtriplett.org>

Author: Mark-Simulacrum

posts/2025-01-09-Rust-1.84.0.md

@@ -42,8 +42,6 @@ stabilize in 1.85), but can be enabled as of 1.84 by setting
 [`package.resolver = "3"`](https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions) in the Cargo.toml manifest file, or
 [`resolver.incompatible-rust-versions = "fallback"`](https://doc.rust-lang.org/cargo/reference/config.html#resolverincompatible-rust-versions) in the Cargo configuration file.
 
-TODO: Should we talk about resolver v3 and/or recommend that as the path to enabling instead?
-
 Read [the documentation](https://doc.rust-lang.org/cargo/reference/resolver.html#rust-version) for more details.
 
 ### Migration to a new trait solver begins