site: remove leftover VWO smartcode

Drops the staging-only VWO Async SmartCode snippet from the head partial
and the matching analytics.vwo account param. VWO is no longer used;
this was left over from the 2024 A/B testing trial on docs-stage.

Signed-off-by: maxcleme <maxime.clement@docker.com>

layouts/_partials/head.html

@@ -43,19 +43,6 @@
   })(window,document,'https://static.hotjar.com/c/hotjar-','.js?sv=');
   </script>
 {{- else if (eq hugo.Environment "staging") -}}
-  <!-- Start VWO Async SmartCode -->
-  <link rel="preconnect" href="https://dev.visualwebsiteoptimizer.com" />
-  <script type='text/javascript' id='vwoCode'>
-  window._vwo_code || (function() {
-  var account_id={{ site.Params.analytics.vwo | safeJS }},
-  version=2.1,
-  settings_tolerance=2000,
-  hide_element='body',
-  hide_element_style = 'opacity:0 !important;filter:alpha(opacity=0) !important;background:none !important',
-  /* DO NOT EDIT BELOW THIS LINE */
-  f=false,w=window,d=document,v=d.querySelector('#vwoCode'),cK='_vwo_'+account_id+'_settings',cc={};try{var c=JSON.parse(localStorage.getItem('_vwo_'+account_id+'_config'));cc=c&&typeof c==='object'?c:{}}catch(e){}var stT=cc.stT==='session'?w.sessionStorage:w.localStorage;code={use_existing_jquery:function(){return typeof use_existing_jquery!=='undefined'?use_existing_jquery:undefined},library_tolerance:function(){return typeof library_tolerance!=='undefined'?library_tolerance:undefined},settings_tolerance:function(){return cc.sT||settings_tolerance},hide_element_style:function(){return'{'+(cc.hES||hide_element_style)+'}'},hide_element:function(){if(performance.getEntriesByName('first-contentful-paint')[0]){return''}return typeof cc.hE==='string'?cc.hE:hide_element},getVersion:function(){return version},finish:function(e){if(!f){f=true;var t=d.getElementById('_vis_opt_path_hides');if(t)t.parentNode.removeChild(t);if(e)(new Image).src='https://dev.visualwebsiteoptimizer.com/ee.gif?a='+account_id+e}},finished:function(){return f},addScript:function(e){var t=d.createElement('script');t.type='text/javascript';if(e.src){t.src=e.src}else{t.text=e.text}d.getElementsByTagName('head')[0].appendChild(t)},load:function(e,t){var i=this.getSettings(),n=d.createElement('script'),r=this;t=t||{};if(i){n.textContent=i;d.getElementsByTagName('head')[0].appendChild(n);if(!w.VWO||VWO.caE){stT.removeItem(cK);r.load(e)}}else{var o=new XMLHttpRequest;o.open('GET',e,true);o.withCredentials=!t.dSC;o.responseType=t.responseType||'text';o.onload=function(){if(t.onloadCb){return t.onloadCb(o,e)}if(o.status===200){_vwo_code.addScript({text:o.responseText})}else{_vwo_code.finish('&e=loading_failure:'+e)}};o.onerror=function(){if(t.onerrorCb){return t.onerrorCb(e)}_vwo_code.finish('&e=loading_failure:'+e)};o.send()}},getSettings:function(){try{var e=stT.getItem(cK);if(!e){return}e=JSON.parse(e);if(Date.now()>e.e){stT.removeItem(cK);return}return e.s}catch(e){return}},init:function(){if(d.URL.indexOf('__vwo_disable__')>-1)return;var e=this.settings_tolerance();w._vwo_settings_timer=setTimeout(function(){_vwo_code.finish();stT.removeItem(cK)},e);var t;if(this.hide_element()!=='body'){t=d.createElement('style');var i=this.hide_element(),n=i?i+this.hide_element_style():'',r=d.getElementsByTagName('head')[0];t.setAttribute('id','_vis_opt_path_hides');v&&t.setAttribute('nonce',v.nonce);t.setAttribute('type','text/css');if(t.styleSheet)t.styleSheet.cssText=n;else t.appendChild(d.createTextNode(n));r.appendChild(t)}else{t=d.getElementsByTagName('head')[0];var n=d.createElement('div');n.style.cssText='z-index: 2147483647 !important;position: fixed !important;left: 0 !important;top: 0 !important;width: 100% !important;height: 100% !important;background: white !important;';n.setAttribute('id','_vis_opt_path_hides');n.classList.add('_vis_hide_layer');t.parentNode.insertBefore(n,t.nextSibling)}var o='https://dev.visualwebsiteoptimizer.com/j.php?a='+account_id+'&u='+encodeURIComponent(d.URL)+'&vn='+version;if(w.location.search.indexOf('_vwo_xhr')!==-1){this.addScript({src:o})}else{this.load(o+'&x=true')}}};w._vwo_code=code;code.init();})();
-  </script>
-  <!-- End VWO Async SmartCode -->
   <script>
   (function(h,o,t,j,a,r){
     h.hj=h.hj||function(){(h.hj.q=h.hj.q||[]).push(arguments)};