Bug 14998: Remove C4::Dates from installer and maintenance folders

Bug 14998: Remove C4::Dates from installer and maintenance folders

- installer/data/mysql/updatedatabase.pl
- misc/maintenance/fix_accountlines_date.pl

To test for updatedatabase.pl

- perl installer/data/mysql/updatedatabase.pl
- review code. Difficult to test, because the code affects
  $DBversion = '3.03.00.035'

To test for misc/maintenance/fix_accountlines_date.pl
 - review code
 - The file seems to be a file used for an update, could it be obsolete?
   If yes, remove it in a follow-up

Signed-off-by: Frederic Demians <f.demians@tamil.fr>
  Code OK. Tested updatedatabase.pl with an old DB backup: OK.
  fix_accountlines_date.pl still working after the patch. Could be removed from
  master IMO.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>