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-rw-r--r--app/javascript/mastodon/base_polyfills.js5
-rw-r--r--app/javascript/mastodon/load_polyfills.js1
2 files changed, 0 insertions, 6 deletions
diff --git a/app/javascript/mastodon/base_polyfills.js b/app/javascript/mastodon/base_polyfills.js
index 12096d902..d3ac0d510 100644
--- a/app/javascript/mastodon/base_polyfills.js
+++ b/app/javascript/mastodon/base_polyfills.js
@@ -4,7 +4,6 @@ import 'es6-symbol/implement';
 import includes from 'array-includes';
 import assign from 'object-assign';
 import values from 'object.values';
-import isNaN from 'is-nan';
 import { decode as decodeBase64 } from './utils/base64';
 import promiseFinally from 'promise.prototype.finally';
 
@@ -20,10 +19,6 @@ if (!Object.values) {
   values.shim();
 }
 
-if (!Number.isNaN) {
-  Number.isNaN = isNaN;
-}
-
 promiseFinally.shim();
 
 if (!HTMLCanvasElement.prototype.toBlob) {
diff --git a/app/javascript/mastodon/load_polyfills.js b/app/javascript/mastodon/load_polyfills.js
index f5a897f75..b2c41303a 100644
--- a/app/javascript/mastodon/load_polyfills.js
+++ b/app/javascript/mastodon/load_polyfills.js
@@ -15,7 +15,6 @@ function loadPolyfills() {
     Array.prototype.includes &&
     HTMLCanvasElement.prototype.toBlob &&
     window.Intl &&
-    Number.isNaN &&
     Object.assign &&
     Object.values &&
     window.Symbol &&