remove deprecated builtinExtensionsServiceUrl api

src/vs/workbench/services/extensionManagement/browser/builtinExtensionsScannerService.ts

@@ -62,9 +62,6 @@ export class BuiltinExtensionsScannerService implements IBuiltinExtensionsScanne
 	}
 
 	private _getBuiltinExtensionsUrl(environmentService: IWorkbenchEnvironmentService): URI | undefined {
-		if (environmentService.options?.builtinExtensionsServiceUrl) {
-			return URI.parse(environmentService.options?.builtinExtensionsServiceUrl);
-		}
 		let enableBuiltinExtensions: boolean;
 		if (environmentService.options && typeof environmentService.options._enableBuiltinExtensions !== 'undefined') {
 			enableBuiltinExtensions = environmentService.options._enableBuiltinExtensions;

src/vs/workbench/workbench.web.api.ts

@@ -322,12 +322,6 @@ interface IWorkbenchConstructionOptions {
 	 */
 	readonly staticExtensions?: ReadonlyArray<IStaticExtension>;
 
-	/**
-	 * [TEMPORARY]: This will be removed soon.
-	 * Service end-point hosting builtin extensions
-	 */
-	readonly builtinExtensionsServiceUrl?: string;
-
 	/**
 	 * [TEMPORARY]: This will be removed soon.
 	 * Enable inlined extensions.