chore(core): remove redundant isModelAvailabilityServiceEnabled toggle and clean up dead code (#15207)

packages/cli/src/config/config.ts

@@ -643,8 +643,6 @@ export async function loadCliConfig(
     extensionLoader: extensionManager,
     enableExtensionReloading: settings.experimental?.extensionReloading,
     enableAgents: settings.experimental?.enableAgents,
-    enableModelAvailabilityService:
-      settings.experimental?.isModelAvailabilityServiceEnabled,
     experimentalJitContext: settings.experimental?.jitContext,
     noBrowser: !!process.env['NO_BROWSER'],
     summarizeToolOutput: settings.model?.summarizeToolOutput,

packages/cli/src/config/settingsSchema.test.ts

@@ -354,21 +354,6 @@ describe('SettingsSchema', () => {
       expect(setting.showInDialog).toBe(false);
       expect(setting.description).toBe('Enable local and remote subagents.');
     });
-
-    it('should have isModelAvailabilityServiceEnabled setting in schema', () => {
-      const setting =
-        getSettingsSchema().experimental.properties
-          .isModelAvailabilityServiceEnabled;
-      expect(setting).toBeDefined();
-      expect(setting.type).toBe('boolean');
-      expect(setting.category).toBe('Experimental');
-      expect(setting.default).toBe(false);
-      expect(setting.requiresRestart).toBe(true);
-      expect(setting.showInDialog).toBe(false);
-      expect(setting.description).toBe(
-        'Enable model routing using new availability service.',
-      );
-    });
   });
 
   it('has JSON schema definitions for every referenced ref', () => {

packages/cli/src/config/settingsSchema.ts

@@ -1323,15 +1323,6 @@ const SETTINGS_SCHEMA = {
           'Enables extension loading/unloading within the CLI session.',
         showInDialog: false,
       },
-      isModelAvailabilityServiceEnabled: {
-        type: 'boolean',
-        label: 'Enable Model Availability Service',
-        category: 'Experimental',
-        requiresRestart: true,
-        default: false,
-        description: 'Enable model routing using new availability service.',
-        showInDialog: false,
-      },
       jitContext: {
         type: 'boolean',
         label: 'JIT Context Loading',