Move emacs-snippets -> doom-snippets

The repo was renamed upstream.

modules/config/default/README.org

@@ -19,7 +19,6 @@ private module.
 * Table of Contents :TOC:
 - [[#install][Install]]
 - [[#configuration][Configuration]]
-  - [[#using-another-snippets-library][Using another snippets library]]
   - [[#im-not-an-evil-user][I'm not an evil user...]]
 - [[#appendix][Appendix]]
   - [[#commands][Commands]]
@@ -29,19 +28,6 @@ private module.
 This module has no external dependencies.
 
 * Configuration
-** Using another snippets library
-Don't want to use provided one? Then add this to your private module,
-
-#+BEGIN_SRC emacs-lisp
-;; in config/$USER/packages.el
-(package! emacs-snippets :ignore t)
-
-;; in config/$USER/config.el
-(def-package-hook! emacs-snippets :disabled t)
-(after! yasnippet
-  (push "~/path/to/my/private/snippets" yas-snippet-dirs))
-#+END_SRC
-
 ** I'm not an evil user...
 That's fine. All evil configuration is ignored if =:editor evil= is disabled.