REST API: Remove misleading comment in WP_REST_Blocks_Controller->get_item_schema.

In r56093 schema caching was added above a comment instructing developers not to cache that controller's schema. However, there is no obvious penalty for re-caching schema that is partially derived from a parent.

Caching schema in the same way in every controller is beneficial consistency, and discussion at WCUS2023 contributor day concluded we could remove this comment.

Props ahardyjpl, davidbinda, johnjamesjacoby, TimothyBlynJacobs.

Fixes #59193. See #58657.


git-svn-id: https://develop.svn.wordpress.org/trunk@56459 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php

@@ -75,7 +75,6 @@ class WP_REST_Blocks_Controller extends WP_REST_Posts_Controller {
 			return $this->add_additional_fields_schema( $this->schema );
 		}
 
-		// Do not cache this schema because all properties are derived from parent controller.
 		$schema = parent::get_item_schema();
 
 		/*