Remove OpenClaw fallback compatibility

lib/server/ai.test.ts

@@ -5,7 +5,6 @@ import {
   runAiAnalysis
 } from './ai';
 
-type EnvSource = Record<string, string | undefined>;
 const CODING_API_BASE_URL = 'https://api.z.ai/api/coding/paas/v4';
 
 describe('ai config and runtime', () => {
@@ -87,25 +86,10 @@ describe('ai config and runtime', () => {
     expect(generate).not.toHaveBeenCalled();
   });
 
-  it('warns once when deprecated OPENCLAW_* env vars are present', () => {
-    const warn = mock((_message: string) => {});
-
-    const env: EnvSource = {
-      OPENCLAW_API_KEY: 'legacy-key',
-      OPENCLAW_BASE_URL: 'http://legacy.local',
-      ZHIPU_API_KEY: 'new-key'
-    };
-
-    getAiConfig({ env, warn });
-    getAiConfig({ env, warn });
-
-    expect(warn).toHaveBeenCalledTimes(1);
-  });
-
   it('warns once when ZHIPU_BASE_URL is set because coding endpoint is hardcoded', () => {
     const warn = mock((_message: string) => {});
 
-    const env: EnvSource = {
+    const env = {
       ZHIPU_API_KEY: 'new-key',
       ZHIPU_BASE_URL: 'https://api.z.ai/api/paas/v4'
     };
@@ -116,25 +100,6 @@ describe('ai config and runtime', () => {
     expect(warn).toHaveBeenCalledTimes(1);
   });
 
-  it('does not consume OPENCLAW_* values for live generation', async () => {
-    const generate = mock(async () => ({ text: 'should-not-be-used' }));
-    const warn = mock((_message: string) => {});
-
-    const result = await runAiAnalysis('Legacy-only env prompt', undefined, {
-      env: {
-        OPENCLAW_API_KEY: 'legacy-key',
-        OPENCLAW_MODEL: 'legacy-model'
-      },
-      warn,
-      generate
-    });
-
-    expect(result.provider).toBe('local-fallback');
-    expect(result.model).toBe('glm-4.7-flashx');
-    expect(generate).not.toHaveBeenCalled();
-    expect(warn).toHaveBeenCalledTimes(1);
-  });
-
   it('uses configured ZHIPU values and injected generator when API key exists', async () => {
     const createModel = mock((config: {
       apiKey?: string;