tools/magit: replace magithub with forge #1174

And we're back to using the latest version of magit, which should
resolve void-function and void-variable errors that we were avioding in
33ef9034.

modules/tools/magit/packages.el

@@ -1,18 +1,9 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; tools/magit/packages.el
 
-;; Magit introduced some breaking changes in a recent commit that breaks
-;; evil-magit and magithub.
-;; TODO Once those packages have updated, we'll go back to tracking magit HEAD
-(when (package! magit :recipe
-        (:fetcher github
-         :repo "magit/magit"
-         :commit "78114e6425d5e7d6eaa7712c845f28694aa7faeb"
-         :files ("lisp/magit" "lisp/magit*.el" "lisp/git-rebase.el")))
+(when (package! magit)
+  (package! forge)
   (package! magit-gitflow)
-  (if (featurep! +forge)
-      (package! forge)
-    (package! magithub))
   (package! magit-todos)
   (when (featurep! :feature evil +everywhere)
     (package! evil-magit)))