Remove Atom from editors section

Both Atom and the plugin are no longer maintained, therefore we'll no
longer list it under the editor integrations. Users are of course free
to continue tinkering with the Atom plugin or to fork it!

Author: fwcd

EDITORS.md

@@ -6,9 +6,6 @@ See [vscode-kotlin-ide](https://github.com/fwcd/vscode-kotlin-ide) or install th
 ## Sublime Text
 See [lsp-kotlin](https://github.com/sublimelsp/LSP-kotlin).
 
-## Atom
-See [atom-ide-kotlin](https://github.com/fwcd/atom-ide-kotlin).
-
 ## Emacs
 _using [`lsp-mode`](https://github.com/emacs-lsp/lsp-mode)_
 
@@ -30,7 +27,7 @@ Then you can activate `lsp-kotlin-lens-mode` to see the Run/Debug code lenses at
 
 
 ### Override members (e.g, toString and equals)
-The language server provides a custom protocol extension for finding overridable members of a class (variables and methods). `lsp-mode` provides a function that uses this called `lsp-kotlin-implement-member`. You can run it while hovering a class name, and you will get a menu with all available overridable members. (protip: Bind this function to a key!). If you have [Helm](https://github.com/emacs-helm/helm) or [Ivy](https://github.com/abo-abo/swiper) installed, one of them will be utilized. 
+The language server provides a custom protocol extension for finding overridable members of a class (variables and methods). `lsp-mode` provides a function that uses this called `lsp-kotlin-implement-member`. You can run it while hovering a class name, and you will get a menu with all available overridable members. (protip: Bind this function to a key!). If you have [Helm](https://github.com/emacs-helm/helm) or [Ivy](https://github.com/abo-abo/swiper) installed, one of them will be utilized.