made activity date and time field configurable

modules/opencase_entities/src/Entity/OCActivity.php

@@ -225,25 +225,14 @@ class OCActivity extends RevisionableContentEntityBase implements OCActivityInte
     $fields['activity_date_time'] = BaseFieldDefinition::create('datetime')
       ->setLabel(t('Date and time'))
       ->setRevisionable(TRUE)
-      ->setRequired(TRUE)
       ->setDefaultValueCallback('\Drupal\opencase_entities\Entity\OCActivity::currentDateTime')
       ->setDisplayConfigurable('form', true)
       ->setDisplayConfigurable('view', true)
       ->setSettings([
           'datetime_type' => 'date'
-        ])
-      ->setDisplayOptions('view', [
-        'label' => 'above',
-        'type' => 'datetime_default',
-        'settings' => [
-          'format_type' => 'short',
-        ],
-        'weight' => -3,
-      ])
-      ->setDisplayOptions('form', [
-        'type' => 'datetime_default',
-        'weight' => -3,
-      ]);
+       ])
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayConfigurable('view', TRUE);
 
     $fields['status'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('Publishing status'))