Christoph Nakazawa f377926677 Remove isNode call from Map polyfill
Summary: There are no DOM Nodes in React Native so our Map polyfill does not need to consider that use case. I deleted the references to `isNode` and `IE. In case this is important for react-native-web, I suggest to shim the Map polyfill with an IE compatible one outside of react-native.

Reviewed By: yungsters

Differential Revision: D13138030

fbshipit-source-id: 661511ea03b4477bd55d0fdf5e485178fe59d96b
2018-11-26 06:28:24 -08:00
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2018-11-26 06:28:24 -08:00
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