fix(specs): clean up abTest schema on listIndices response (generated)

algolia/api-clients-automation#6448

Co-authored-by: algolia-bot <accounts+algolia-api-client-bot@algolia.com>
Co-authored-by: Thomas Raffray <Fluf22@users.noreply.github.com>

Author: algolia-bot

packages/client-search/model/fetchedIndexAbTest.ts

@@ -12,11 +12,6 @@ export type FetchedIndexAbTest = {
    */
   id: number;
 
-  /**
-   * Whether the A/B test is a dark test (server-side measured, not user-facing). Only present when true.
-   */
-  isDark?: boolean | undefined;
-
   /**
    * A/B test schema version. Only present for v2 and later tests.
    */