fix(plugin): restore package publishing

packages/core/src/plugin/hooks.ts

@@ -1,7 +1,6 @@
 export * as PluginHooks from "./hooks"
 
 import type { AISDKHooks } from "@opencode-ai/plugin/v2/effect/aisdk"
-import type { SessionHooks } from "@opencode-ai/plugin/v2/effect/session"
 import type { ToolHooks } from "@opencode-ai/plugin/v2/effect/tool"
 import { Context, Effect, Layer, Scope } from "effect"
 import { makeLocationNode } from "../effect/app-node"
@@ -9,7 +8,6 @@ import { State } from "../state"
 
 export interface Domains {
   readonly aisdk: AISDKHooks
-  readonly session: SessionHooks
   readonly tool: ToolHooks
 }