Added unit tests for posthog-llm.tool.ts - minor cleanup

src/tools/posthog-llm.tool.test.ts

@@ -18,10 +18,6 @@ jest.mock('../utils/error.util.js');
 jest.mock('../controllers/posthog-llm.controller.js');
 jest.mock('../types/posthog-llm.types.js');
 
-// Mock the capturePosthogLlmObservability function since it's not exported
-// We'll need to access it through the server.tool registration
-const mockCapturePosthogLlmObservability = jest.fn();
-
 // Mock MCP Server
 const mockMcpServer = {
 	tool: jest.fn(),