docs: 移除C++相关文档内容

- 从导航栏中删除C++条目
- 删除C++学习笔记目录及其配置文件
- 清理Python字符串格式化文档中的冗余示例表格

docs/.vuepress/notes.ts

@@ -15,18 +15,6 @@ const LeetCode = defineNoteConfig({
     }
   ]
 })
-const cPlusPlus = defineNoteConfig({
-  dir: 'programming',
-  link: '/programming/cplusplus/',
-  sidebar: [
-    { text: "C++ 学习笔记", link: "/programming/cplusplus/" },
-    {
-      text: "基础配置与开发工具", prefix: "/basis", items: [
-        { text: "C++ 环境配置", link: "/programming/cplusplus/basis/" }
-      ]
-    }
-  ]
-})
 const english = defineNoteConfig({
   dir: 'subject',
   link: '/subject/english/',
@@ -190,5 +178,5 @@ const web = defineNoteConfig({
 export default defineNotesConfig({
   dir: 'notes',
   link: '/',
-  notes: [LeetCode, english, cPlusPlus, solidity, blockchain, linux, docker, cryptography, web],
+  notes: [LeetCode, english, solidity, blockchain, linux, docker, cryptography, web],
 })