Remove mentions of Atom editor

_en/basics/lua.md

@@ -78,7 +78,6 @@ Commonly used editors which are well-suited for Lua include:
     open source (as Code-OSS or VSCodium), popular, and has
     [plugins for Minetest modding](https://marketplace.visualstudio.com/items?itemName=GreenXenith.minetest-tools).
 * [Notepad++](http://notepad-plus-plus.org/) - Windows-only
-* [Atom](http://atom.io/)
 
 Other suitable editors are also available.
 

_en/quality/luacheck.md

@@ -101,7 +101,6 @@ It is highly recommended that you find and install a plugin for your editor of c
 to show you errors without running a command. Most editors will likely have a plugin
 available.
 
-* **Atom** - `linter-luacheck`.
 * **VSCode** - Ctrl+P, then paste: `ext install dwenegar.vscode-luacheck`
 * **Sublime** - Install using package-control:
         [SublimeLinter](https://github.com/SublimeLinter/SublimeLinter),

_it/quality/luacheck.md

@@ -95,7 +95,6 @@ Dài un occhio alla lista sottostante.
 È caldamente consigliato installare un'estensione per il tuo editor di fiducia che ti mostri gli errori senza eseguire alcun comando.
 Queste sono disponibili nella maggior parte degli editor, come:
 
-* **Atom** - `linter-luacheck`;
 * **VSCode** - Ctrl+P, poi incolla: `ext install dwenegar.vscode-luacheck`;
 * **Sublime** - Installala usando package-control:
         [SublimeLinter](https://github.com/SublimeLinter/SublimeLinter),