Kindly review a new patch.
However, this is really about removing deprecated ...

Kindly review a new patch.

However, this is really about removing deprecated code from migrate_drupal, only the test is in datetime. Maybe we should remove all deprecations from that module in this issue?

For this i have seen there are many deprecated code is still present in migrate_drupal module and it is not related to datetime module, So i think it's better to not remove all deprecations in this issue. We can handle all deprecations from migrate_drupal module in new issue.