Remove outdated roadmap links in README.md (#5744)

Co-authored-by: Josh Black <joshblack@github.com>

Author: lesliecdubs

README.md

@@ -42,10 +42,6 @@ yarn add @primer/react
 
 The fastest way make a prototype or try Primer React without setting up a new project is by using our [react template](https://github.com/primer/react-template).
 
-## Roadmap
-
-You can track our roadmap progress in the [Roadmap Project Board](https://github.com/primer/react/projects/3), see more detail in the [quarterly planning Discussions](https://github.com/primer/react/discussions?discussions_q=%5BRoadmap%5D), and find a [list of all the current epic tracking issues](https://github.com/primer/react/discussions/997).
-
 ## Contributing
 
 We love collaborating with folks inside and outside of GitHub and welcome contributions!