remove old_book (#395)

Author: fdncred

.vuepress/config.js

@@ -139,41 +139,41 @@ module.exports = {
               ],
             },
           ],
-          '/old_book/': [
-            {
-              title: 'Nu Book (0.44)',
-              collapsable: false,
-              children: [
-                '',
-                'installation',
-                'moving_around',
-                'types_of_data',
-                'loading_data',
-                'working_with_lists',
-                'working_with_tables',
-                'pipeline',
-                'configuration',
-                'custom_commands',
-                'aliases',
-                'operators',
-                'math',
-                'variables_and_subexpressions',
-                'environment',
-                'scripts',
-                'metadata',
-                'shells_in_shells',
-                'escaping',
-                'plugins',
-                'dataframes',
-                'coming_from_bash',
-                'nushell_map',
-                'nushell_map_imperative',
-                'nushell_map_functional',
-                'nushell_operator_map',
-                'command_reference',
-              ],
-            },
-          ],
+        //   '/old_book/': [
+        //     {
+        //       title: 'Nu Book (0.44)',
+        //       collapsable: false,
+        //       children: [
+        //         '',
+        //         'installation',
+        //         'moving_around',
+        //         'types_of_data',
+        //         'loading_data',
+        //         'working_with_lists',
+        //         'working_with_tables',
+        //         'pipeline',
+        //         'configuration',
+        //         'custom_commands',
+        //         'aliases',
+        //         'operators',
+        //         'math',
+        //         'variables_and_subexpressions',
+        //         'environment',
+        //         'scripts',
+        //         'metadata',
+        //         'shells_in_shells',
+        //         'escaping',
+        //         'plugins',
+        //         'dataframes',
+        //         'coming_from_bash',
+        //         'nushell_map',
+        //         'nushell_map_imperative',
+        //         'nushell_map_functional',
+        //         'nushell_operator_map',
+        //         'command_reference',
+        //       ],
+        //     },
+        //   ],
           // "/contributor-book/": [
           //   {
           //     title: "Contributor Book",

book/README.md

@@ -1,10 +1,5 @@
 # Introduction
 
-::: warning
-This is the version of the book that works with the version of Nushell in main (0.60 and later).
-For the 0.44 version of Nushell, you should read the [0.44 version of the book](/old_book/).
-:::
-
 Hello, and welcome to the Nushell project. The goal of this project is to take the Unix philosophy of shells, where pipes connect simple commands together, and bring it to the modern style of development.
 
 Nu takes cues from a lot of familiar territory: traditional shells like bash, object based shells like PowerShell, gradually typed languages like TypeScript, functional programming, systems programming, and more. But rather than trying to be a jack of all trades, Nu focuses its energy on doing a few things well:

de/book/README.md

@@ -1,10 +1,5 @@
 # Einführung
 
-::: warning
-Diese Version des Buchs funktioniert mit der aktuellen Version von Nushell (0.59 und aktueller).
-Für die Versionen 0.44 und älter von Nushell, sollte die [alte Version](/old_book/) gelesen werden.
-:::
-
 Hallo und herzlich Willkommen beim Nushell Projekt. Das Ziel diese Projekts ist es, die Philosophie von Unix Shells, wo Pipes einfache Befehle miteinander verbinden, mit modernen Ansätzen zu verbinden.
 
 Nu ist von vielen Seiten beeinflusst: traditionelle Shells wie Bash, objektbasierte Shells wie PowerShell, funktionale Programmierung, Systems Programming und viele Weitere. Aber statt die eierlegende Wollmilchsau zu sein, liegt der Fokus von Nu darauf, die angebotenen Funktionen gut zu beherrschen:

zh-CN/book/README.md

@@ -1,10 +1,5 @@
 # 介绍
 
-::: warning
-本书适用于 Nushell 当前主版本（0.60 及以后的版本）。
-对于 0.44 版本的 Nushell，你应该阅读[本书的 0.44 版本](/old_book/)。
-:::
-
 你好，欢迎来到 Nushell 项目。这个项目的目标是把 Unix 的 Shell 哲学，即用管道把简单的命令连接在一起，并把它带到更具现代风格的开发中。
 
 Nu 汲取了很多熟悉领域的灵感：传统 Shell 比如 Bash、基于对象的 Shell 比如 PowerShell、逐步类型化的语言比如 TypeScript、函数式编程、系统编程，等等。但是，Nu 并不试图成为万金油，而是把精力集中在做好这几件事上: