Doc: remove unused script in site

docs/src/components/demo-block.vue

@@ -1,17 +0,0 @@
-<template>
-  <zan-doc-block :class="`demo-${component}`">
-    <slot name="highlight"></slot>
-  </zan-doc-block>
-</template>
-
-<script>
-export default {
-  name: 'demo-block',
-
-  computed: {
-    component() {
-      return this.$route.path.split('/').pop();
-    }
-  }
-};
-</script>

docs/src/index.js

@@ -3,7 +3,6 @@ import VueRouter from 'vue-router';
 import App from './ExamplesDocsApp';
 import routes from './router.config';
 import ZanDoc from 'zan-doc';
-import DemoBlock from './components/demo-block';
 
 const isMobile = (function() {
   var platform = navigator.userAgent.toLowerCase();
@@ -13,7 +12,6 @@ const isMobile = (function() {
 
 Vue.use(VueRouter);
 Vue.use(ZanDoc);
-Vue.component(DemoBlock.name, DemoBlock);
 
 const routesConfig = routes();
 routesConfig.push({