Put cleanup hook attachment in an init method.

plugins/woocommerce/includes/class-wc-rate-limiter.php

@@ -36,6 +36,13 @@ class WC_Rate_Limiter {
 	 */
 	const CACHE_GROUP = 'wc_rate_limit';
 
+	/**
+	 * Hook in methods.
+	 */
+	public static function init() {
+		add_action( 'woocommerce_cleanup_rate_limits', array( __CLASS__, 'cleanup' ) );
+	}
+
 	/**
 	 * Constructs key name from action identifier.
 	 * Left in for backwards compatibility.
@@ -162,3 +169,5 @@ class WC_Rate_Limiter {
 		}
 	}
 }
+
+WC_Rate_Limiter::init();

plugins/woocommerce/includes/wc-core-functions.php

@@ -2548,10 +2548,3 @@ function wc_cache_get_multiple( $keys, $group = '', $force = false ) {
 	}
 	return $values;
 }
-
-/**
- * Cleans up rate limit data - cron callback.
- *
- * @since 6.0.0
- */
-add_action( 'woocommerce_cleanup_rate_limits', array( 'WC_Rate_Limiter', 'cleanup' ) );