refactor(instance): retire WithInstance adapter (#27782)

packages/opencode/src/project/with-instance.ts

@@ -1,12 +0,0 @@
-import { AppRuntime } from "@/effect/app-runtime"
-import type { InstanceContext } from "./instance-context"
-import { InstanceStore } from "./instance-store"
-
-export async function provide<R>(input: { directory: string; fn: (ctx: InstanceContext) => R }): Promise<R> {
-  const ctx = await AppRuntime.runPromise(
-    InstanceStore.Service.use((store) => store.load({ directory: input.directory })),
-  )
-  return input.fn(ctx)
-}
-
-export * as WithInstance from "./with-instance"