[kbn-ui-shared-deps] Remove outdated polyfills (#96339)

NOTICE.txt

@@ -261,33 +261,6 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
----
-This product bundles childnode-remove which is available under a
-"MIT" license.
-
-The MIT License (MIT)
-
-Copyright (c) 2016-present, jszhou
-https://github.com/jserz/js_piece
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
 ---
 This product bundles code based on probot-metadata@1.0.0 which is
 available under a "MIT" license.

package.json

@@ -208,7 +208,6 @@
     "content-disposition": "0.5.3",
     "copy-to-clipboard": "^3.0.8",
     "core-js": "^3.6.5",
-    "custom-event-polyfill": "^0.3.0",
     "cytoscape": "^3.10.0",
     "cytoscape-dagre": "^2.2.2",
     "d3": "3.5.17",

packages/kbn-ui-shared-deps/polyfills.js

@@ -8,7 +8,6 @@
 
 require('core-js/stable');
 require('regenerator-runtime/runtime');
-require('custom-event-polyfill');
 
 if (typeof window.Event === 'object') {
   // IE11 doesn't support unknown event types, required by react-use
@@ -17,6 +16,4 @@ if (typeof window.Event === 'object') {
 }
 
 require('whatwg-fetch');
-require('abortcontroller-polyfill/dist/polyfill-patch-fetch');
-require('./vendor/childnode_remove_polyfill');
 require('symbol-observable');

yarn.lock

@@ -10950,11 +10950,6 @@ currently-unhandled@^0.4.1:
   dependencies:
     array-find-index "^1.0.1"
 
-custom-event-polyfill@^0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/custom-event-polyfill/-/custom-event-polyfill-0.3.0.tgz#99807839be62edb446b645832e0d80ead6fa1888"
-  integrity sha1-mYB4Ob5i7bRGtkWDLg2A6tb6GIg=
-
 cwise-compiler@^1.0.0, cwise-compiler@^1.1.2:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/cwise-compiler/-/cwise-compiler-1.1.3.tgz#f4d667410e850d3a313a7d2db7b1e505bb034cc5"