docs: remove outdated caveat about useId in async Server Components

Author: ohjooyeong

src/content/reference/react/useId.md

@@ -46,8 +46,6 @@ function PasswordField() {
 
 * `useId` **should not be used to generate keys** in a list. [Keys should be generated from your data.](/learn/rendering-lists#where-to-get-your-key)
 
-* `useId` currently cannot be used in [async Server Components](/reference/rsc/server-components#async-components-with-server-components).
-
 ---
 
 ## Usage {/*usage*/}