Increase sync_updates cron expiration to 7 days and drop filter

Hardcode WEEK_IN_SECONDS for cron cleanup, matching the auto-draft
cleanup precedent in core. Remove the wp_sync_updates_expiration filter
to keep the API surface minimal for v1.

Author: josephfusco

src/wp-includes/collaboration.php

@@ -24,7 +24,7 @@ function wp_collaboration_inject_setting() {
 }
 
 /**
- * Deletes sync updates older than 1 day from the wp_sync_updates table.
+ * Deletes sync updates older than 7 days from the wp_sync_updates table.
  *
  * Rows left behind by abandoned collaborative editing sessions are cleaned up
  * to prevent unbounded table growth.
@@ -34,22 +34,10 @@ function wp_collaboration_inject_setting() {
 function wp_delete_old_sync_updates() {
 	global $wpdb;
 
-	/**
-	 * Filters the lifetime, in seconds, of a sync update row.
-	 *
-	 * By default, the lifetime is 1 day. Once a row reaches that age, it will
-	 * automatically be deleted by a cron job.
-	 *
-	 * @since 7.0.0
-	 *
-	 * @param int $expiration The expiration age of a sync update row, in seconds.
-	 */
-	$expiration = apply_filters( 'wp_sync_updates_expiration', DAY_IN_SECONDS );
-
 	$wpdb->query(
 		$wpdb->prepare(
 			"DELETE FROM {$wpdb->sync_updates} WHERE created_at < %s",
-			gmdate( 'Y-m-d H:i:s', time() - $expiration )
+			gmdate( 'Y-m-d H:i:s', time() - WEEK_IN_SECONDS )
 		)
 	);
 }