don't use globally available non-standard Math.scale

Author: zloirock

packages/core-js/internals/math-scale.js

@@ -1,7 +1,7 @@
 'use strict';
 // `Math.scale` method implementation
 // https://rwaldron.github.io/proposal-math-extensions/
-module.exports = Math.scale || function scale(x, inLow, inHigh, outLow, outHigh) {
+module.exports = function scale(x, inLow, inHigh, outLow, outHigh) {
   var nx = +x;
   var nInLow = +inLow;
   var nInHigh = +inHigh;