refactor!(magit): remove magit-gitflow

BREAKING CHANGE: This commit removes the magit-gitflow package because:

- It is not considered a "universal" default. I.e. The majority of git
  users do not know of or use it, much less need it.
- The elisp configuration for it is trivial. It doesn't warrant
  Doom-specific support for it and is trivial enough for end-users to
  deploy themselves with minimal difficulty.

Close: #7015

modules/tools/magit/README.org

@@ -21,7 +21,6 @@ This module provides Magit, an interface to the Git version control system.
 - [[doom-package:forge]] if [[doom-module:+forge]]
 - [[doom-package:code-review]] if [[doom-module:+forge]]
 - [[doom-package:magit]]
-- [[doom-package:magit-gitflow]]
 - [[doom-package:magit-todos]]
 
 ** Hacks

modules/tools/magit/config.el

@@ -222,10 +222,6 @@ ensure it is built when we actually use Forge."
   (define-key magit-todos-section-map "j" nil))
 
 
-(use-package! magit-gitflow
-  :hook (magit-mode . turn-on-magit-gitflow))
-
-
 (use-package! evil-collection-magit
   :when (modulep! :editor evil +everywhere)
   :defer t
@@ -280,13 +276,7 @@ ensure it is built when we actually use Forge."
         (setcar desc (cdr key))))
     (evil-define-key* evil-collection-magit-state git-rebase-mode-map
       "gj" #'git-rebase-move-line-down
-      "gk" #'git-rebase-move-line-up))
-
-  (after! magit-gitflow
-    (evil-define-key* '(normal visual) magit-mode-map
-      "%" #'magit-gitflow-popup)
-    (transient-append-suffix 'magit-dispatch 'magit-worktree
-      '("%" "Gitflow" magit-gitflow-popup))))
+      "gk" #'git-rebase-move-line-up)))
 
 
 (use-package! evil-collection-magit-section

modules/tools/magit/packages.el

@@ -8,5 +8,4 @@
     (package! code-review
       :recipe (:files ("graphql" "code-review*.el"))
       :pin "95b36ec8e7935f96b2f3c6c9086d49cf4a72cbff"))
-  (package! magit-gitflow :pin "cc41b561ec6eea947fe9a176349fb4f771ed865b")
   (package! magit-todos :pin "c5030cc27c7c1a48db52b0134bf2648a59a43176"))