remove some polyfill

Author: asukaminato0721

src/core/shim.js

@@ -1,90 +0,0 @@
-// requestAnim shim layer by Paul Irish
-// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
-// http://my.opera.com/emoller/blog/2011/12/20/
-// requestanimationframe-for-smart-er-animating
-// requestAnimationFrame polyfill by Erik Möller
-// fixes from Paul Irish and Tino Zijdel
-window.requestAnimationFrame = (() =>
-  window.requestAnimationFrame ||
-  window.webkitRequestAnimationFrame ||
-  window.mozRequestAnimationFrame ||
-  window.oRequestAnimationFrame ||
-  window.msRequestAnimationFrame ||
-  ((callback, element) => {
-    // should '60' here be framerate?
-    window.setTimeout(callback, 1000 / 60);
-  }))();
-
-/**
- * shim for Uint8ClampedArray.slice
- * (allows arrayCopy to work with pixels[])
- * with thanks to http://halfpapstudios.com/blog/tag/html5-canvas/
- * Enumerable set to false to protect for...in from
- * Uint8ClampedArray.prototype pollution.
- */
-(() => {
-  if (
-    typeof Uint8ClampedArray !== 'undefined' &&
-    !Uint8ClampedArray.prototype.slice
-  ) {
-    Object.defineProperty(Uint8ClampedArray.prototype, 'slice', {
-      value: Array.prototype.slice,
-      writable: true,
-      configurable: true,
-      enumerable: false
-    });
-  }
-})();
-
-/**
- * this is implementation of Object.assign() which is unavailable in
- * IE11 and (non-Chrome) Android browsers.
- * The assign() method is used to copy the values of all enumerable
- * own properties from one or more source objects to a target object.
- * It will return the target object.
- * Modified from https://github.com/ljharb/object.assign
- */
-(() => {
-  if (!Object.assign) {
-    const keys = Object.keys;
-    const defineProperty = Object.defineProperty;
-    const canBeObject = obj => typeof obj !== 'undefined' && obj !== null;
-    const hasSymbols =
-      typeof Symbol === 'function' && typeof Symbol() === 'symbol';
-    const propIsEnumerable = Object.prototype.propertyIsEnumerable;
-    const isEnumerableOn = obj =>
-      (function isEnumerable(prop) {
-        return propIsEnumerable.call(obj, prop);
-      });
-
-    // per ES6 spec, this function has to have a length of 2
-    const assignShim = function assign(target, source1) {
-      if (!canBeObject(target)) {
-        throw new TypeError('target must be an object');
-      }
-      const objTarget = Object(target);
-      let s, source, i, props;
-      for (s = 1; s < arguments.length; ++s) {
-        source = Object(arguments[s]);
-        props = keys(source);
-        if (hasSymbols && Object.getOwnPropertySymbols) {
-          props.push(
-            ...Object.getOwnPropertySymbols(source)
-              .filter(isEnumerableOn(source))
-          );
-        }
-        for (i = 0; i < props.length; ++i) {
-          objTarget[props[i]] = source[props[i]];
-        }
-      }
-      return objTarget;
-    };
-
-    defineProperty(Object, 'assign', {
-      value: assignShim,
-      configurable: true,
-      enumerable: false,
-      writable: true
-    });
-  }
-})();