Rename JSX files with proper .jsx extension (#23733)

app/javascript/mastodon/containers/admin_component.js

@@ -1,26 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import { IntlProvider, addLocaleData } from 'react-intl';
-import { getLocale } from '../locales';
-
-const { localeData, messages } = getLocale();
-addLocaleData(localeData);
-
-export default class AdminComponent extends React.PureComponent {
-
-  static propTypes = {
-    locale: PropTypes.string.isRequired,
-    children: PropTypes.node.isRequired,
-  };
-
-  render () {
-    const { locale, children } = this.props;
-
-    return (
-      <IntlProvider locale={locale} messages={messages}>
-        {children}
-      </IntlProvider>
-    );
-  }
-
-}