diff --git a/package.json b/package.json
index 114d7a3b58..0fbc1912d0 100644
--- a/package.json
+++ b/package.json
@@ -23,8 +23,7 @@
     "test": "env NODE_PATH=$NODE_PATH:./assets/js/src mocha --require tests/javascript/babel_register.js tests/javascript/**/*.spec.js",
     "check-types": "tsc --noEmit",
     "storybook": "start-storybook -s ./ -p 8083",
-    "build-storybook": "build-storybook",
-    "postinstall": "node packages_postinstall.js"
+    "build-storybook": "build-storybook"
   },
   "dependencies": {
     "@babel/runtime": "^7.10.2",
diff --git a/packages_postinstall.js b/packages_postinstall.js
deleted file mode 100644
index 4d636370e9..0000000000
--- a/packages_postinstall.js
+++ /dev/null
@@ -1,17 +0,0 @@
-/**
- * This is a temporary fix of a bug in @wordpress/block-editor@4.1.0 package.
- * It is already fixed and merged in master https://github.com/WordPress/gutenberg/commit/1e43db126e33e13173f9af9113cb9f39f9be7f1f
- * We can remove this fix after upgrading the package to a version newer than 4.1.0
- */
-const fs = require('fs');
-const fileToFix = './node_modules/@wordpress/block-editor/build-module/components/button-block-appender/index.js';
-fs.readFile(fileToFix, 'utf8', (err,data) => {
-  if (err) {
-    return console.log(err);
-  }
-  var result = data.replace(/" ", inserterButton, " "/g, 'inserterButton');
-
-  fs.writeFile(fileToFix, result, 'utf8', (err) => {
-    if (err) return console.log(err);
-  });
-});