Cleanup webpack example configs (#606)

* Remove Buffer/process plugins

* Adjust

* Cleanup README

packages/vue-identicon/src/Demo.ts

@@ -1,40 +0,0 @@
-// Copyright 2017-2022 @polkadot/vue-identicon authors & contributors
-// SPDX-License-Identifier: Apache-2.0
-
-import Vue, { VNode } from 'vue';
-
-import Identicon from './index';
-
-interface Data {
-  address: string;
-  size: number;
-}
-
-/**
- * @name Demo
- * @description Demo component
- */
-const Demo = Vue.extend({
-  components: {
-    Identicon
-  },
-  data: function (): Data {
-    return {
-      address: '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY',
-      size: 128
-    };
-  },
-  name: 'Demo',
-  template: `
-    <div id="demo">
-      <Identicon :size="size" :theme="'polkadot'" :value="address" />
-      <Identicon :size="size" :theme="'substrate'" :value="address" />
-      <Identicon :size="size" :theme="'beachball'" :value="address" />
-      <Identicon :size="size" :theme="'empty'" />
-    </div>
-  `
-});
-
-new Vue({
-  render: (h): VNode => h(Demo)
-}).$mount('#demo');