fix: removed unused imports and increased the version

Author: contentstackMridul

README.md

@@ -16,7 +16,7 @@ Alternatively, if you want to include the package directly in your website HTML
 
 ```html
 <script type='module'  integrity='sha384-b6G+ggU20rGxqCqsgaS6zludFgj5N11xsuXhMEIARMuQY2PtyDS04TU0H5goP+32' crossorigin="anonymous">
-     import ContentstackLivePreview from 'https://esm.sh/@contentstack/live-preview-utils@3.5.0';
+     import ContentstackLivePreview from 'https://esm.sh/@contentstack/live-preview-utils@4.0.0';
 
      ContentstackLivePreview.init({
         stackDetails: {

package-lock.json

@@ -1,6 +1,6 @@
 {
     "name": "@contentstack/live-preview-utils",
-    "version": "3.5.0",
+    "version": "4.0.0",
     "description": "Contentstack provides the Live Preview SDK to establish a communication channel between the various Contentstack SDKs and your website, transmitting  live changes to the preview pane.",
     "type": "module",
     "types": "dist/legacy/index.d.ts",

package.json

@@ -1,7 +1,6 @@
 import { EventManager } from "@contentstack/advanced-post-message";
 import { LIVE_PREVIEW_CHANNEL_ID } from "./livePreviewEventManager.constant";
 import { isOpeningInNewTab } from "../../common/inIframe";
-import { Z } from "vitest/dist/chunks/reporters.D7Jzd9GS.js";
 
 let livePreviewPostMessage: EventManager | undefined;