Remove some unused/non-existing packages

configuration.org

@@ -1514,9 +1514,6 @@ The cookies are from the Hungarian version an ancient MS-DOS based program calle
    ("RET" . dired-find-alternate-file)
    ("^" . (lambda () (interactive) (find-alternate-file "..")))
    ("W" . wdired-change-to-wdired-mode)))
-
-(use-package dired-x
-  :ensure nil)
 #+END_SRC
 
 ** Actionable URLs
@@ -2727,15 +2724,6 @@ Maybe add ∉ for ~not in~ later, if possible.
                          '("def" . 402))))
 #+END_SRC
 
-** Automatically load the virtualenv if there is one
-
-#+BEGIN_SRC emacs-lisp
-(use-package auto-virtualenv
-  :hook
-  (python-mode . auto-virtualenv-set-virtualenv)
-  (projectile-after-switch-project . auto-virtualenv-set-virtualenv))
-#+END_SRC
-
 ** ElPy
 
 #+BEGIN_SRC emacs-lisp