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

packages/opencode/src/question/index.ts

@@ -61,7 +61,7 @@ export interface Interface {
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Question") {}
 
-export const layer = Layer.effect(
+const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const events = yield* EventV2Bridge.Service
@@ -156,8 +156,6 @@ export const layer = Layer.effect(
   }),
 )
 
-export const defaultLayer = layer.pipe(Layer.provide(EventV2Bridge.defaultLayer))
-
 export const node = LayerNode.make({ service: Service, layer: layer, deps: [EventV2Bridge.node] })
 
 export * as Question from "."