chore: remove rewrite PR disclaimer

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,7 +1,3 @@
-## Svelte compiler rewrite
-
-Please note that [the Svelte codebase is currently being rewritten](https://svelte.dev/blog/runes). Thus, it's best to hold off on new features or refactorings for the time being.
-
 ### Before submitting the PR, please make sure you do the following
 
 - [ ] It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs