Clean up remains of URL History List (eHISTORY).

f7feb4227d83f4f095597a44826277aaae2bc0df killed the adding of
documents to this list, which however caused fdo#72006 as the
"Load URL" control still used this list, which has now been
fixed to use the Picklist, hence we can completely kill the history
list.

Change-Id: Ib4c6892aff0bf5d6e32985041a3ac7c416d8d726
Reviewed-on: https://gerrit.libreoffice.org/9105
Tested-by: Andrzej Hunt <andrzej.hunt@collabora.com>
Reviewed-by: Andrzej Hunt <andrzej.hunt@collabora.com>