docs: Update partial-hydration.md and remove outdated incompatibility…

… note (#37735)

Update partial-hydration.md

docs/docs/how-to/performance/partial-hydration.md

@@ -169,7 +169,6 @@ const Page = () => (
 
 Please note these current limitations:
 
-- The [Gatsby Slice API](/docs/reference/built-in-components/gatsby-slice/) and Partial Hydration are not compatible with each other. When using Partial Hydration you can't use Gatsby Slices and the other way around.
 - You have to use React's experimental release which we **don't** recommend using in production
 - A lot of packages in the React ecosystem are not ready for React server components (e.g. CSS-in-JS solutions)
 - Partial Hydration only works during `gatsby build` & `gatsby serve`, and not `gatsby develop`