Remove ligature package

Remove org and which-key from packages since org 9.7 and which-key are
both built-in as of Emacs30

system/home/emacs/default.nix

@@ -48,10 +48,7 @@
         khalel
         mu4e
         # Other (TODO sort)
-        ligature
-        which-key
         diff-hl
-        org
         org-roam
         org-noter
         citar

system/home/emacs/init.el

@@ -69,20 +69,6 @@
 (global-visual-line-mode +1)
 (setopt visual-line-fringe-indicators '(left-curly-arrow right-curly-arrow))
 
-(use-package ligature
-  :load-path "external-packages/ligature.el/"
-  :functions (ligature-set-ligatures
-              global-ligature-mode)
-  :config
-  (ligature-set-ligatures
-   '(prog-mode)
-   '(("<" (rx (= 1 "=")))
-     (">" (rx (= 1 "=")))
-     ("-" (rx (* "-") (= 1 ">")))
-     ("=" (rx (* "=") (? ">")))
-     ("!" (rx (+ "=")))))
-  (global-ligature-mode +1))
-
 (setq split-height-threshold nil
       split-width-threshold 160)