Use edit_media_item_permissions_check directly

Remove redundant finalize_item_permissions_check wrapper
and use edit_media_item_permissions_check directly for the
finalize route, consistent with the sideload route pattern.

Author: adamsilverstein

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

@@ -111,7 +111,7 @@ public function register_routes() {
 					array(
 						'methods'             => WP_REST_Server::CREATABLE,
 						'callback'            => array( $this, 'finalize_item' ),
-						'permission_callback' => array( $this, 'finalize_item_permissions_check' ),
+						'permission_callback' => array( $this, 'edit_media_item_permissions_check' ),
 						'args'                => array(
 							'id' => array(
 								'description' => __( 'Unique identifier for the attachment.' ),
@@ -2206,18 +2206,6 @@ private static function filter_wp_unique_filename( $filename, $dir, $number, $at
 		return $filename;
 	}
 
-	/**
-	 * Checks if a given request has access to finalize an attachment.
-	 *
-	 * @since 7.0.0
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access, WP_Error object otherwise.
-	 */
-	public function finalize_item_permissions_check( WP_REST_Request $request ) {
-		return $this->edit_media_item_permissions_check( $request );
-	}
-
 	/**
 	 * Finalizes an attachment after client-side media processing.
 	 *