refactor(opencode): remove core service layer exports (#34518)

packages/opencode/src/format/index.ts

@@ -28,7 +28,7 @@ export class Service extends Context.Service<Service, Interface>()("@opencode/Fo
 
 export const use = serviceUse(Service)
 
-export const layer = Layer.effect(
+const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const config = yield* Config.Service
@@ -194,12 +194,6 @@ export const layer = Layer.effect(
   }),
 )
 
-export const defaultLayer = layer.pipe(
-  Layer.provide(Config.defaultLayer),
-  Layer.provide(AppProcess.defaultLayer),
-  Layer.provide(RuntimeFlags.defaultLayer),
-)
-
 export const node = LayerNode.make({
   service: Service,
   layer: layer,