Replace company by corfu

I haven't really used `company` in the recent past, so removing this
package does not hurt much.  Maybe `corfu` will be more practical for
me, as it also only relies on builtin in-buffer completion and does not
require additional magic.  However, I usually do not use popup
completion dialogs much, because I find them obstructive.

init.el

@@ -2216,10 +2216,6 @@ Note that this workaround is incomplete, as explained in this comment."
               recentf-save-file (expand-file-name "recentf" emacs-d-userdata))
   :config (run-with-timer 0 3600 #'recentf-save-list))
 
-(use-package company
-  :commands (company-mode)
-  :init (setq company-show-quick-access t))
-
 (use-package marginalia
   :ensure t
   :commands (marginalia-mode)
@@ -2257,6 +2253,9 @@ Note that this workaround is incomplete, as explained in this comment."
                 consult-preview-key nil))
   :config (require 'consult-imenu))
 
+(use-package corfu
+  :commands (global-corfu-mode corfu-mode))
+
 
 ;; * Navigation