Do not automatically indent anymore in Org mode after newline

`org-return-indent` is obsolete since 9.4, one should use `org-return` with
`indent` set to `t` instead – and I am not sure whether it will work if I rebind
`org-return` to some interactive lambda form.  So let's try to not indentent
automatically anymore, maybe this is good enough?

init.el

@@ -543,7 +543,6 @@
 (use-package org
   :pin "gnu"
   :bind (:map org-mode-map
-              ([remap org-return] . org-return-indent)
               ([remap org-clock-goto] . db/org-clock-goto-first-open-checkbox))
   :init (progn
           (setq org-deadline-warning-days 14