removes facebook tracking code (#992)

site/index.pug

@@ -30,20 +30,6 @@ html(lang='en-GB')
             /*! loadCSS rel=preload polyfill. [c]2017 Filament Group, Inc. MIT License */
             !function(e){if(e.loadCSS){var t=loadCSS.relpreload={};if(t.support=function(){try{return e.document.createElement("link").relList.supports("preload")}catch(t){return!1}},t.poly=function(){for(var t=e.document.getElementsByTagName("link"),n=0;n<t.length;n++){var o=t[n];"preload"===o.rel&&"style"===o.getAttribute("as")&&(e.loadCSS(o.href,o,o.getAttribute("media")),o.rel=null)}},!t.support()){t.poly();var n=e.setInterval(t.poly,300);e.addEventListener&&e.addEventListener("load",function(){t.poly(),e.clearInterval(n)}),e.attachEvent&&e.attachEvent("onload",function(){e.clearInterval(n)})}}}(this);
 
-        //- Facebook Pixel Code
-        script.
-            !function(f,b,e,v,n,t,s)
-            {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
-            n.callMethod.apply(n,arguments):n.queue.push(arguments)};
-            if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
-            n.queue=[];t=b.createElement(e);t.async=!0;
-            t.src=v;s=b.getElementsByTagName(e)[0];
-            s.parentNode.insertBefore(t,s)}(window,document,'script',
-            'https://connect.facebook.net/en_US/fbevents.js');
-            fbq('init', '127689627854077');
-            fbq('track', 'PageView');
-        //- End Facebook Pixel Code
-
         //- Begin LinkedIn Pixel Code
         script.
             _linkedin_data_partner_id = "103577";