docs(emacs): remove undo-tree

docs/emacs/keybinding-managers.org

@@ -68,7 +68,6 @@ they are much more comfortable than Emacs’.
         evil-want-C-u-scroll t
         evil-want-C-i-jump nil)
   (require 'evil-vars)
-  (evil-set-undo-system 'undo-tree)
   :config
   <<evil-undefine-keys>>
   <<evil-bepo>>
@@ -156,52 +155,6 @@ additional code compared to most people due to the bépo layout.
   (evil-collection-init))
 #+end_src
 
-~undo-tree~ is my preferred way of undoing and redoing stuff. The main
-reason is it doesn’t create a linear undo/redo history, but rather a
-complete tree you can navigate to see your complete editing history.
-One of the two obvious things to do are to tell Emacs to save all its
-undo history files in a dedicated directory, otherwise we’d risk
-littering all of our directories. The second thing is to simply
-globally enable its mode.
-#+begin_src emacs-lisp
-(use-package undo-tree
-  :defer t
-  :straight (:build t)
-  :custom
-  (undo-tree-history-directory-alist
-   `(("." . ,(expand-file-name (file-name-as-directory "undo-tree-hist")
-                               user-emacs-directory))))
-  :init
-  (global-undo-tree-mode)
-  :config
-  <<undo-tree-ignore-text-properties>>
-  <<undo-tree-compress-files>>
-  (setq undo-tree-visualizer-diff       t
-        undo-tree-visualizer-timestamps t
-        undo-tree-auto-save-history     t
-        undo-tree-enable-undo-in-region t
-        undo-limit        (* 800 1024)
-        undo-strong-limit (* 12 1024 1024)
-        undo-outer-limit  (* 128 1024 1024)))
-#+end_src
-
-An interesting behaviour from DoomEmacs is to compress the history
-files with ~zstd~ when it is present on the system. Not only do we enjoy
-much smaller files (according to DoomEmacs, we get something like 80%
-file savings), Emacs can load them much faster than the regular files.
-Sure, it uses more CPU time uncompressing these files, but it’s
-insignificant, and it’s still faster than loading a heavier file.
-#+name: undo-tree-compress-files
-#+begin_src emacs-lisp :tangle no
-(when (executable-find "zstd")
-  (defun my/undo-tree-append-zst-to-filename (filename)
-    "Append .zst to the FILENAME in order to compress it."
-    (concat filename ".zst"))
-  (advice-add 'undo-tree-make-history-save-file-name
-              :filter-return
-              #'my/undo-tree-append-zst-to-filename))
-#+end_src
-
 ** Hydra
 [[https://github.com/abo-abo/hydra][Hydra]] is a simple menu creator for keybindings.
 #+begin_src emacs-lisp

docs/emacs/keybindings.org

@@ -62,7 +62,6 @@ Undefining some stuff to make keybind prefixes work correctly.
   "'"   '(shell-pop :package shell-pop)
   "R"   #'recompile
   "u"   #'universal-argument
-  "U"   '(undo-tree-visualize :package undo-tree)
 
   <<general-keybindings-gen(table=keybindings-tabs, prefix="TAB ")>>
   <<general-keybindings-gen(table=keybindings-apps, prefix="a")>>