diff --git a/platform/chromium/vapi-polyfill.js b/platform/chromium/vapi-polyfill.js
deleted file mode 100644
index 4fc5687f1..000000000
--- a/platform/chromium/vapi-polyfill.js
+++ /dev/null
@@ -1,146 +0,0 @@
-/*******************************************************************************
-
-    uBlock Origin - a browser extension to block requests.
-    Copyright (C) 2015 Raymond Hill
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see {http://www.gnu.org/licenses/}.
-
-    Home: https://github.com/gorhill/uBlock
-*/
-
-/******************************************************************************/
-
-(function() {
-
-'use strict';
-
-/******************************************************************************/
-
-// https://github.com/gorhill/uBlock/issues/1067
-// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
-// Firefox 17/Chromium 41 supports `startsWith`.
-
-if ( String.prototype.startsWith instanceof Function === false ) {
-    String.prototype.startsWith = function(needle, pos) {
-        if ( typeof pos !== 'number' ) {
-            pos = 0;
-        }
-        return this.lastIndexOf(needle, pos) === pos;
-    };
-}
-
-// https://github.com/gorhill/uBlock/issues/1067
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
-// Firefox 17/Chromium 41 supports `endsWith`.
-
-if ( String.prototype.endsWith instanceof Function === false ) {
-    String.prototype.endsWith = function(needle, pos) {
-        if ( typeof pos !== 'number' ) {
-            pos = this.length;
-        }
-        pos -= needle.length;
-        return this.indexOf(needle, pos) === pos;
-    };
-}
-
-/******************************************************************************/
-
-// https://github.com/gorhill/uBlock/issues/1070
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
-// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
-// is not an accurate API of the real Set() type.
-
-if ( typeof self.Set !== 'function' ) {
-    self.Set = function() {
-        this.clear();
-    };
-
-    self.Set.polyfill = true;
-
-    self.Set.prototype.clear = function() {
-        this._set = Object.create(null);
-        this.size = 0;
-    };
-
-    self.Set.prototype.add = function(k) {
-        if ( this._set[k] === undefined ) {
-            this._set[k] = true;
-            this.size += 1;
-        }
-    };
-
-    self.Set.prototype.delete = function(k) {
-        if ( this._set[k] !== undefined ) {
-            delete this._set[k];
-            this.size -= 1;
-        }
-    };
-
-    self.Set.prototype.has = function(k) {
-        return this._set[k] !== undefined;
-    };
-}
-
-/******************************************************************************/
-
-// https://github.com/gorhill/uBlock/issues/1070
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
-// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
-// is not an accurate API of the real Map() type.
-
-if ( typeof self.Map !== 'function' ) {
-    self.Map = function() {
-        this.clear();
-    };
-
-    self.Map.polyfill = true;
-
-    self.Map.prototype.clear = function() {
-        this._map = Object.create(null);
-        this.size = 0;
-    };
-
-    self.Map.prototype.delete = function(k) {
-        if ( this._map[k] !== undefined ) {
-            delete this._map[k];
-            this.size -= 1;
-        }
-    };
-
-    self.Map.prototype.get = function(k) {
-        return this._map[k];
-    };
-
-    self.Map.prototype.has = function(k) {
-        return this._map[k] !== undefined;
-    };
-
-    self.Map.prototype.set = function(k, v) {
-        if ( v !== undefined ) {
-            if ( this._map[k] === undefined ) {
-                this.size += 1;
-            }
-            this._map[k] = v;
-        } else {
-            if ( this._map[k] !== undefined ) {
-                this.size -= 1;
-            }
-            delete this._map[k];
-        }
-    };
-}
-
-/******************************************************************************/
-
-})();