fix: require modifyBlogPluginOptions to delete the archive classifier

Author: ulivz

example/.vuepress/config.js

@@ -3,15 +3,6 @@ module.exports = {
   description: 'This is a blog example built by VuePress',
   theme: require.resolve('../../'),
   themeConfig: {
-    /**
-     * Ref: https://vuepress-theme-blog.ulivz.com/#modifyblogpluginoptions
-     * Workaround of https://github.com/ulivz/vuepress-plugin-blog/issues/1
-     */
-    modifyBlogPluginOptions(blogPlugnOptions) {
-      const archiveDirectoryClassifierIndex = blogPlugnOptions.directories.findIndex(d => d.id === 'archive')
-      blogPlugnOptions.directories.splice(archiveDirectoryClassifierIndex, 1)
-      return blogPlugnOptions
-    },
     /**
      * Ref: https://vuepress-theme-blog.ulivz.com/#nav
      */

index.js

@@ -24,17 +24,6 @@ module.exports = (themeConfig, ctx) => {
           lengthPerPage: 5,
         },
       },
-      {
-        id: 'archive',
-        dirname: '_archive',
-        path: '/archive/',
-        // layout: 'IndexArchive', defaults to `Layout.vue`
-        itemLayout: 'Post',
-        itemPermalink: '/archive/:year/:month/:day/:slug',
-        pagination: {
-          lengthPerPage: 5,
-        },
-      },
     ],
     frontmatters: [
       {
@@ -54,7 +43,7 @@ module.exports = (themeConfig, ctx) => {
 
   const blogPluginOptions = typeof modifyBlogPluginOptions === 'function'
     ? modifyBlogPluginOptions(defaultBlogPluginOptions)
-    : themeConfig
+    : defaultBlogPluginOptions
 
   const plugins = [
     '@vuepress/plugin-nprogress',