[TASK] Remove unused polyfill

lib/infobox/node.js

@@ -92,7 +92,7 @@ define(['sorttable', 'snabbdom', 'd3-interpolate', 'moment', 'helper'],
           string.push(V.h('br'));
         }
 
-        if (!ip.startsWith('fe80:')) {
+        if (ip.indexOf('fe80:') !== 0) {
           string.push(V.h('a', { props: { href: 'http://[' + ip + ']/', target: '_blank' } }, ip));
         } else {
           string.push(ip);

polyfill.js

@@ -7,54 +7,6 @@ if (!String.prototype.includes) {
   };
 }
 
-if (!String.prototype.startsWith) {
-  String.prototype.startsWith = function (searchString, position) {
-    position = position || 0;
-    return this.substr(position, searchString.length) === searchString;
-  };
-}
-
-if (!String.prototype.repeat) {
-  String.prototype.repeat = function (count) {
-    'use strict';
-    if (this === null) {
-      throw new TypeError('can\'t convert ' + this + ' to object');
-    }
-    var str = '' + this;
-    count = +count;
-    if (count < 0) {
-      throw new RangeError('repeat count must be non-negative');
-    }
-    if (count === Infinity) {
-      throw new RangeError('repeat count must be less than infinity');
-    }
-    count = Math.floor(count);
-    if (str.length === 0 || count === 0) {
-      return '';
-    }
-    // Ensuring count is a 31-bit integer allows us to heavily optimize the
-    // main part. But anyway, most current (August 2014) browsers can't handle
-    // strings 1 << 28 chars or longer, so:
-    if (str.length * count >= 1 << 28) {
-      throw new RangeError('repeat count must not overflow maximum string size');
-    }
-    var rpt = '';
-    for (; ;) {
-      if ((count & 1) === 1) {
-        rpt += str;
-      }
-      count >>>= 1;
-      if (count === 0) {
-        break;
-      }
-      str += str;
-    }
-    // Could we try:
-    // return Array(count + 1).join(this);
-    return rpt;
-  };
-}
-
 if (typeof Object.assign !== 'function') {
   Object.assign = function(target, varArgs) { // .length of function is 2
     if (target == null) { // TypeError if undefined or null