Remove unnecessary optimizeFonts key from type (#24563)

#21676 moved `fontOptimization` out of the experimental key of `NextConfig` to the top level, so it should be removed from the type

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.

## Documentation / Examples

- [ ] Make sure the linting passes

packages/next/next-server/server/config-shared.ts

@@ -44,7 +44,6 @@ export type NextConfig = { [key: string]: any } & {
     reactMode?: 'legacy' | 'concurrent' | 'blocking'
     workerThreads?: boolean
     pageEnv?: boolean
-    optimizeFonts?: boolean
     optimizeImages?: boolean
     optimizeCss?: boolean
     scrollRestoration?: boolean