Remove use of FieldDate in core #7
Description
There are 3 locations that the FieldDate class is used by the core system. This means that if Classic fields isn't installed, fatal errors will be thrown since FieldDate doesn't exist.
The locations it is used are src/Symphony/Views/PublishView.php#L177, src/Symphony/Views/PublishView.php#L436, and src/Symphony/Datasources/SectionDatasource.php#L469. Note these are links to the wip-2.8.x branch.
Need to refactor the code to remove reliance on FieldDate class.