diff --git a/addons/web_calendar/static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.js b/addons/web_calendar/static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.js
deleted file mode 100644
index 5d48e5a13e0..00000000000
--- a/addons/web_calendar/static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.js
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
-This software is allowed to use under GPL or you need to obtain Commercial or Enterise License
-to use it in non-GPL project. Please contact sales@dhtmlx.com for details
-*/
-window.dhtmlx||(dhtmlx=function(a){for(var b in a)dhtmlx[b]=a[b];return dhtmlx});
-dhtmlx.extend_api=function(a,b,c){var d=window[a];if(d)window[a]=function(a){if(a&&typeof a=="object"&&!a.tagName){var c=d.apply(this,b._init?b._init(a):arguments),g;for(g in dhtmlx)if(b[g])this[b[g]](dhtmlx[g]);for(g in a)if(b[g])this[b[g]](a[g]);else g.indexOf("on")==0&&this.attachEvent(g,a[g])}else c=d.apply(this,arguments);b._patch&&b._patch(this);return c||this},window[a].prototype=d.prototype,c&&dhtmlXHeir(window[a].prototype,c)};
-dhtmlxAjax={get:function(a,b){var c=new dtmlXMLLoaderObject(!0);c.async=arguments.length<3;c.waitCall=b;c.loadXML(a);return c},post:function(a,b,c){var d=new dtmlXMLLoaderObject(!0);d.async=arguments.length<4;d.waitCall=c;d.loadXML(a,!0,b);return d},getSync:function(a){return this.get(a,null,!0)},postSync:function(a,b){return this.post(a,b,null,!0)}};
-function dtmlXMLLoaderObject(a,b,c,d){this.xmlDoc="";this.async=typeof c!="undefined"?c:!0;this.onloadAction=a||null;this.mainObject=b||null;this.waitCall=null;this.rSeed=d||!1;return this}dtmlXMLLoaderObject.count=0;
-dtmlXMLLoaderObject.prototype.waitLoadFunction=function(a){var b=!0;return this.check=function(){if(a&&a.onloadAction!=null&&(!a.xmlDoc.readyState||a.xmlDoc.readyState==4)&&b){b=!1;dtmlXMLLoaderObject.count++;if(typeof a.onloadAction=="function")a.onloadAction(a.mainObject,null,null,null,a);if(a.waitCall)a.waitCall.call(this,a),a.waitCall=null}}};
-dtmlXMLLoaderObject.prototype.getXMLTopNode=function(a,b){if(this.xmlDoc.responseXML){var c=this.xmlDoc.responseXML.getElementsByTagName(a);c.length==0&&a.indexOf(":")!=-1&&(c=this.xmlDoc.responseXML.getElementsByTagName(a.split(":")[1]));var d=c[0]}else d=this.xmlDoc.documentElement;if(d)return this._retry=!1,d;if(!this._retry)return this._retry=!0,b=this.xmlDoc,this.loadXMLString(this.xmlDoc.responseText.replace(/^[\s]+/,""),!0),this.getXMLTopNode(a,b);dhtmlxError.throwError("LoadXML","Incorrect XML",
-[b||this.xmlDoc,this.mainObject]);return document.createElement("DIV")};dtmlXMLLoaderObject.prototype.loadXMLString=function(a,b){if(_isIE)this.xmlDoc=new ActiveXObject("Microsoft.XMLDOM"),this.xmlDoc.async=this.async,this.xmlDoc.onreadystatechange=function(){},this.xmlDoc.loadXML(a);else{var c=new DOMParser;this.xmlDoc=c.parseFromString(a,"text/xml")}if(!b){if(this.onloadAction)this.onloadAction(this.mainObject,null,null,null,this);if(this.waitCall)this.waitCall(),this.waitCall=null}};
-dtmlXMLLoaderObject.prototype.loadXML=function(a,b,c,d){this.rSeed&&(a+=(a.indexOf("?")!=-1?"&":"?")+"a_dhx_rSeed="+(new Date).valueOf());this.filePath=a;this.xmlDoc=!_isIE&&window.XMLHttpRequest?new XMLHttpRequest:new ActiveXObject("Microsoft.XMLHTTP");if(this.async)this.xmlDoc.onreadystatechange=new this.waitLoadFunction(this);this.xmlDoc.open(b?"POST":"GET",a,this.async);d?(this.xmlDoc.setRequestHeader("User-Agent","dhtmlxRPC v0.1 ("+navigator.userAgent+")"),this.xmlDoc.setRequestHeader("Content-type",
-"text/xml")):b&&this.xmlDoc.setRequestHeader("Content-type","application/x-www-form-urlencoded");this.xmlDoc.setRequestHeader("X-Requested-With","XMLHttpRequest");this.xmlDoc.send(c);this.async||(new this.waitLoadFunction(this))()};
-dtmlXMLLoaderObject.prototype.destructor=function(){return this.setXSLParamValue=this.getXMLTopNode=this.xmlNodeToJSON=this.doSerialization=this.loadXMLString=this.loadXML=this.doXSLTransToString=this.doXSLTransToObject=this.doXPathOpera=this.doXPath=this.xmlDoc=this.mainObject=this.onloadAction=this.filePath=this.rSeed=this.async=this._retry=this._getAllNamedChilds=this._filterXPath=null};
-dtmlXMLLoaderObject.prototype.xmlNodeToJSON=function(a){for(var b={},c=0;c-1&&(_isChrome=!0);
-if(navigator.userAgent.indexOf("Safari")!=-1||navigator.userAgent.indexOf("Konqueror")!=-1)_KHTMLrv=parseFloat(navigator.userAgent.substr(navigator.userAgent.indexOf("Safari")+7,5)),_KHTMLrv>525?(_isFF=!0,_FFrv=1.9):_isKHTML=!0;else if(navigator.userAgent.indexOf("Opera")!=-1)_isOpera=!0,_OperaRv=parseFloat(navigator.userAgent.substr(navigator.userAgent.indexOf("Opera")+6,3));else if(navigator.appName.indexOf("Microsoft")!=-1){if(_isIE=!0,(navigator.appVersion.indexOf("MSIE 8.0")!=-1||navigator.appVersion.indexOf("MSIE 9.0")!=
--1||navigator.appVersion.indexOf("MSIE 10.0")!=-1)&&document.compatMode!="BackCompat")_isIE=8}else _isFF=!0,_FFrv=parseFloat(navigator.userAgent.split("rv:")[1]);
-dtmlXMLLoaderObject.prototype.doXPath=function(a,b,c,d){if(_isKHTML||!_isIE&&!window.XPathResult)return this.doXPathOpera(a,b);if(_isIE)return b||(b=this.xmlDoc.nodeName?this.xmlDoc:this.xmlDoc.responseXML),b||dhtmlxError.throwError("LoadXML","Incorrect XML",[b||this.xmlDoc,this.mainObject]),c!=null&&b.setProperty("SelectionNamespaces","xmlns:xsl='"+c+"'"),d=="single"?b.selectSingleNode(a):b.selectNodes(a)||[];else{var e=b;b||(b=this.xmlDoc.nodeName?this.xmlDoc:this.xmlDoc.responseXML);b||dhtmlxError.throwError("LoadXML",
-"Incorrect XML",[b||this.xmlDoc,this.mainObject]);b.nodeName.indexOf("document")!=-1?e=b:(e=b,b=b.ownerDocument);var f=XPathResult.ANY_TYPE;if(d=="single")f=XPathResult.FIRST_ORDERED_NODE_TYPE;var g=[],h=b.evaluate(a,e,function(){return c},f,null);if(f==XPathResult.FIRST_ORDERED_NODE_TYPE)return h.singleNodeValue;for(var k=h.iterateNext();k;)g[g.length]=k,k=h.iterateNext();return g}};function v(){if(!this.catches)this.catches=[];return this}v.prototype.catchError=function(a,b){this.catches[a]=b};
-v.prototype.throwError=function(a,b,c){if(this.catches[a])return this.catches[a](a,b,c);if(this.catches.ALL)return this.catches.ALL(a,b,c);alert("Error type: "+a+"\nDescription: "+b);return null};window.dhtmlxError=new v;
-dtmlXMLLoaderObject.prototype.doXPathOpera=function(a,b){var c=a.replace(/[\/]+/gi,"/").split("/"),d=null,e=1;if(!c.length)return[];if(c[0]==".")d=[b];else if(c[0]=="")d=(this.xmlDoc.responseXML||this.xmlDoc).getElementsByTagName(c[e].replace(/\[[^\]]*\]/g,"")),e++;else return[];for(;e