docs: simplify CONTRIBUTING.md structure

Author: matthewjberger

CONTRIBUTING.md

@@ -4,22 +4,8 @@ Thank you for your interest in contributing to Nightshade!
 
 ## Current Status
 
-Nightshade is currently in its early stages of development. The project is not accepting external contributions at this time as the architecture and core systems are still being established.
-
-## Future Contributions
-
-Once the engine reaches a more mature and stable state, I will open up contributions and provide detailed contributor guidelines. At that time, this document will be updated with:
-
-* Code style guidelines
-* Development setup instructions
-* Pull request process
-* Issue reporting guidelines
-* Architecture documentation
+Nightshade is currently in its early stages of development. The project is not accepting external contributions at this time as the architecture and core systems are still being established. Once the engine reaches a more mature and stable state, I will open up contributions and provide detailed contributor guidelines.
 
 ## License
 
 Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as MIT and Apache-2.0, without any additional terms or conditions.
-
-## Questions?
-
-If you have questions about the project, feel free to open an issue for discussion.