remove sleep function

lib/utils.js

@@ -7,13 +7,6 @@ if (!globalThis.fetch) {
   globalThis.fetch = (await import("node-fetch")).default;
 }
 
-/**
- * Sleeps for a specified amount of time.
- * @param {number} [ms=350] The amount of time in ms.
- */
-export const sleep = (ms = 350) =>
-  new Promise((resolve) => setTimeout(resolve, ms));
-
 /**
  * Checks if the value is a valid domain.
  * @param {string} value The value to be checked.