test: remove session file absence assertions

extensions/llm-task/src/llm-task-tool.test.ts

@@ -279,7 +279,6 @@ describe("llm-task tool (json-only)", () => {
     mockEmbeddedRunJson({ ok: true });
     const call = await executeEmbeddedRun({ prompt: "x" });
     expect(call.disableTools).toBe(true);
-    expect(call.sessionFile).toBeUndefined();
     expect(call.agentId).toBe("main");
     expect(call.sessionId).toMatch(/^llm-task-/);
   });

src/gateway/server-methods/agent.test.ts

@@ -507,7 +507,6 @@ describe("gateway agent handler", () => {
     await runMainAgent("test", "test-idem-stale-transcript");
 
     expect(capturedEntry?.sessionId).not.toBe("old-session-id");
-    expect(capturedEntry?.sessionFile).toBeUndefined();
   });
 
   it("keeps stored group metadata when a trusted group session receives caller-supplied selectors", async () => {