docs: borg does not respect nodump flag by default any more

(cherry picked from commit 7ddf7c451fc9d13a31f244283778b9d30d2dc12e)

src/borg/archiver.py

@@ -2883,9 +2883,6 @@ class Archiver:
         and not include any other contents of the containing folder, this can be enabled
         through using the ``--keep-exclude-tags`` option.
 
-        Borg respects the nodump flag. Files flagged nodump will be marked as excluded (x)
-        in ``--list`` output.
-
         Item flags
         ++++++++++