#31 API DELETE

* adds support for DELETE method for all relevant objects
* improves get_obj_from_db functionality
* drops custom compensation logic for get_obj_from_db due to improvement of base method

api/utils/serializer/v1/compensation.py

@@ -129,23 +129,6 @@ class CompensationAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensa
 
             return obj.id
 
-    def get_obj_from_db(self, id, user):
-        """ Returns the object from database
-
-        Fails if id not found or user does not have shared access
-
-        Args:
-            id (str): The object's id
-            user (User): The API user
-
-        Returns:
-
-        """
-        return self.model.objects.get(
-            id=id,
-            intervention__users__in=[user]
-        )
-
     def update_model_from_json(self, id, json_model, user):
         """ Updates an entry for the model based on the contents of json_model