[Emacs] Remove ESS layer and odf-mode, add org-roam support

org/config/emacs.org

@@ -252,6 +252,7 @@
            org-enable-epub-support t
            org-enable-github-support t
            org-enable-hugo-support t
+           org-enable-roam-support t
            org-enable-reveal-js-support t
            org-enable-sticky-header t
            spaceline-org-clock-p t
@@ -334,13 +335,12 @@
      :PROPERTIES:
      :CUSTOM_ID: Spacemacs_layers_and_packages-Layers-Programming_languages-Domain-specific_(DSLs)-2c919937
      :END:
-     In this  category, I enabled  support for  the R programming  language (the
- ~ess~ layer), the ~major-modes~ layer for the Arch Linux PKGBUILDs support,
-     the ~prolog~, ~emacs-lisp~ and ~scheme~  layers, support for the CSV format
-     with the ~csv~ layer, the ~yaml~ language, shell scripting  languages and
-     support for the ~dot~ tool with the ~graphviz~ layer.
+     In this  category, I enabled  support for  the ~major-modes~ layer  for the
+     Arch Linux PKGBUILDs support, ~emacs-lisp~ and ~scheme~ layers, support for
+     the CSV format  with the ~csv~ layer, the ~yaml~  language, shell scripting
+     languages and support for the ~dot~ tool with the ~graphviz~ layer.
      #+BEGIN_SRC emacs-lisp
-       ess major-modes prolog emacs-lisp scheme graphviz yaml shell-scripts
+       major-modes emacs-lisp scheme graphviz yaml shell-scripts
      #+END_SRC
 
      I also added support  for HTML and CSS with the ~html~  layer, with the web
@@ -1301,13 +1301,6 @@
     (load "~/.config/emacs/private/private_emacs")
   #+END_SRC
 
-  Let’s also load  the file defining ~odf-mode~, a mode  for viewing the content
-  of ODF files  generated by OpenOffice and LibreOffice (if  you use one, please
-  use the latter).
-  #+BEGIN_SRC emacs-lisp
-    (load "~/.config/emacs/private/odf-mode")
-  #+END_SRC
-
   Then, I want a couple of requires:
   #+BEGIN_SRC emacs-lisp
     (require 'org-id)