fix(cli): remove unused variables in test files

Remove unused 'host' variables in autonomous mode tests and unused 'vi' import
in json-event-emitter-result.test.ts to fix ESLint no-unused-vars errors.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: taltas

apps/cli/src/agent/__tests__/extension-host.test.ts

@@ -942,7 +942,7 @@ describe("ExtensionHost", () => {
 		it("should set ROO_CLI_AUTONOMOUS environment variable when autonomous is true", () => {
 			const originalValue = process.env.ROO_CLI_AUTONOMOUS
 
-			const host = createTestHost({ autonomous: true })
+			createTestHost({ autonomous: true })
 
 			expect(process.env.ROO_CLI_AUTONOMOUS).toBe("1")
 
@@ -958,7 +958,7 @@ describe("ExtensionHost", () => {
 			const originalValue = process.env.ROO_CLI_AUTONOMOUS
 			delete process.env.ROO_CLI_AUTONOMOUS
 
-			const host = createTestHost({ autonomous: false })
+			createTestHost({ autonomous: false })
 
 			expect(process.env.ROO_CLI_AUTONOMOUS).toBeUndefined()
 

apps/cli/src/agent/__tests__/json-event-emitter-result.test.ts

@@ -1,6 +1,5 @@
 import type { ClineMessage } from "@roo-code/types"
 import { Writable } from "stream"
-import { vi } from "vitest"
 
 import type { TaskCompletedEvent } from "../events.js"
 import { JsonEventEmitter } from "../json-event-emitter.js"