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

packages/core/src/config/config.ts

@@ -326,7 +326,6 @@ export interface ConfigParameters {
       } & { disabled?: string[] });
   previewFeatures?: boolean;
   enableAgents?: boolean;
-  enableModelAvailabilityService?: boolean;
   experimentalJitContext?: boolean;
 }
 
@@ -449,7 +448,6 @@ export class Config {
 
   private previewModelFallbackMode = false;
   private previewModelBypassMode = false;
-  private readonly enableModelAvailabilityService: boolean;
   private readonly enableAgents: boolean;
 
   private readonly experimentalJitContext: boolean;
@@ -513,7 +511,6 @@ export class Config {
     this.bugCommand = params.bugCommand;
     this.model = params.model;
     this._activeModel = params.model;
-    this.enableModelAvailabilityService = true;
     this.enableAgents = params.enableAgents ?? false;
     this.experimentalJitContext = params.experimentalJitContext ?? false;
     this.modelAvailabilityService = new ModelAvailabilityService();
@@ -1309,10 +1306,6 @@ export class Config {
     return this.enableExtensionReloading;
   }
 
-  isModelAvailabilityServiceEnabled(): boolean {
-    return this.enableModelAvailabilityService;
-  }
-
   isAgentsEnabled(): boolean {
     return this.enableAgents;
   }