refactor(core): consolidate references (#31539)

packages/opencode/src/effect/app-runtime.ts

@@ -42,7 +42,6 @@ import { Format } from "@/format"
 import { InstanceLayer } from "@/project/instance-layer"
 import { Project } from "@/project/project"
 import { Vcs } from "@/project/vcs"
-import { Reference } from "@/reference/reference"
 import { Workspace } from "@/control-plane/workspace"
 import { Worktree } from "@/worktree"
 import { Installation } from "@/installation"
@@ -98,7 +97,6 @@ export const AppLayer = Layer.mergeAll(
   Format.defaultLayer,
   Project.defaultLayer,
   Vcs.defaultLayer,
-  Reference.defaultLayer,
   Workspace.defaultLayer,
   Worktree.appLayer,
   Installation.defaultLayer,