diff --git a/03.数据库/03.数据库开发项目代码示例/01.笔记网站/admin_sidebar.php b/03.数据库/03.数据库开发项目代码示例/01.笔记网站/admin_sidebar.php
deleted file mode 100644
index 881d497..0000000
--- a/03.数据库/03.数据库开发项目代码示例/01.笔记网站/admin_sidebar.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-include 'function/admin.php';
-$current = basename($_SERVER['SCRIPT_NAME']);
-?>
-<nav class="admin-nav">
-  <a class="admin-nav-item <?php echo $current == 'admin_categories.php' ? 'active' : ''; ?>" href="admin_categories.php">
-    <span>📂</span> 分类管理
-  </a>
-  <a class="admin-nav-item <?php echo $current == 'admin_notes.php' ? 'active' : ''; ?>" href="admin_notes.php">
-    <span>📝</span> 笔记管理
-  </a>
-  <a class="admin-nav-item <?php echo $current == 'admin_comments.php' ? 'active' : ''; ?>" href="admin_comments.php">
-    <span>💬</span> 评论管理
-  </a>
-  <a class="admin-nav-item <?php echo $current == 'admin_users.php' ? 'active' : ''; ?>" href="admin_users.php">
-    <span>👥</span> 用户管理
-  </a>
-</nav>