chore: cleanup old smart edit settings (#15832)

packages/core/src/tools/smart-edit.test.ts

@@ -89,7 +89,6 @@ describe('SmartEditTool', () => {
       getUsageStatisticsEnabled: vi.fn(() => true),
       getSessionId: vi.fn(() => 'mock-session-id'),
       getContentGeneratorConfig: vi.fn(() => ({ authType: 'mock' })),
-      getUseSmartEdit: vi.fn(() => false),
       getProxy: vi.fn(() => undefined),
       getGeminiClient: vi.fn().mockReturnValue(geminiClient),
       getBaseLlmClient: vi.fn().mockReturnValue(baseLlmClient),