fdo#78786: No need to insert entries here for date members.

Data member entries are inserted when they are added in addDateMember().

(cherry picked from commit 836328d6473ae1a0c472c7dbf8262641c74843cb)

Conflicts:
	sc/source/ui/cctrl/checklistmenu.cxx

Change-Id: I6cb2e3629053fe2bb49517c4ef8d5c1fee576446
Reviewed-on: https://gerrit.libreoffice.org/9398
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>