Disable archive mode in Weekly Review overview

In general, all tasks of the previous week should still be present in this week
and the week before, so there's no need to activate archive mode by default.  If
it's necessary after all, it can be activated manually.

init.el

@@ -1107,7 +1107,6 @@
                 ("W" "Weekly Review"
                  ((agenda ""
                           ((org-agenda-span 7)
-                           (org-agenda-archives-mode t)
                            (org-agenda-dim-blocked-tasks nil)
                            (org-agenda-skip-deadline-prewarning-if-scheduled t)))))))