Do not disable package initialization on startup

This is some relic from former configurations, and might have been wrong quite
some time now.  However, in Emacs 27+, package initialization is done before
loading user-init-file, and thus we don't have to do it by hand.  Before that,
package initialization was done after reading user-init-file, but before calling
after-init-hook, and since we needed to load some packages in the init file, we
had to initialize package.el ourselves.

early-init.el

@@ -9,5 +9,3 @@
         ("gnu" . "https://elpa.gnu.org/packages/")
         ("melpa-stable" . "https://stable.melpa.org/packages/")
         ("org" . "https://orgmode.org/elpa/")))
-
-(setq package-enable-at-startup nil)

init.el

@@ -33,9 +33,8 @@
 ;; * Packages
 
 (when (< emacs-major-version 27)
-  ;; Before Emacs 27.1, we have to do package initialization ourselves.  In
-  ;; Emacs 27.1 and later, it's done in early-init.el, and calling
-  ;; `package-initialize' is not necessary anymore.  See
+  ;; Before Emacs 27.1, we had to do package initialization ourselves.  In Emacs
+  ;; 27.1 and later, it's done in early-init.el.  See
   ;; https://www.gnu.org/software/emacs/news/NEWS.27.1
   (load-file (expand-file-name "early-init.el" emacs-d))
   (package-initialize))