Remove Raven code (closes #2769)

dist/index.html

@@ -11,12 +11,6 @@
         <meta name='apple-mobile-web-app-capable' content='yes' />
         <meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />
 
-        <script src='//d3nslu0hdya83q.cloudfront.net/dist/1.0/raven.min.js'></script>
-
-        <script>
-            Raven.config('https://af8ce79129b24fa28d91ede59302369c@app.getsentry.com/6009').install();
-        </script>
-
         <!--[if !IE]>-->
         <script src='iD.js'></script>
         <script src='presets.js'></script>
@@ -42,24 +36,6 @@
             a.src=document.location.protocol+"//dnn506yrbagrg.cloudfront.net/pages/scripts/0013/6714.js?"+Math.floor(new Date().getTime()/3600000);
             a.async=true;a.type="text/javascript";b.parentNode.insertBefore(a,b)}, 1);
 
-            // Adding a canary for https://app.getsentry.com/id/id/group/5138888/
-            if (Object.defineProperty) {
-                var windowFocus = window.focus;
-                Object.defineProperty(window, 'focus', {
-                    get: function() {
-                        return windowFocus;
-                    },
-
-                    set: function() {
-                        try {
-                            throw new Error("tried to overwrite window.focus");
-                        } catch(e) {
-                            Raven.captureException(e);
-                        }
-                    }
-                });
-            }
-
             if (typeof iD == 'undefined') {
                 document.getElementById('id-container').innerHTML = 'Sorry, Internet Explorer is not currently supported. Please use Potlatch 2 to edit the map.';
                 document.getElementById('id-container').className = 'unsupported';