remove unneccessary ses endpoint tests

app/notifications/notifications_ses_callback.py

@@ -1,7 +1,6 @@
 from datetime import datetime
 
 from flask import (
-    Blueprint,
     current_app,
     json
 )
@@ -14,14 +13,6 @@ from app.dao import (
 from app.celery.statistics_tasks import create_outcome_notification_statistic_tasks
 from app.notifications.process_client_response import validate_callback_data
 
-ses_callback_blueprint = Blueprint('notifications_ses_callback', __name__)
-
-from app.errors import (
-    register_errors,
-    InvalidRequest
-)
-register_errors(ses_callback_blueprint)
-
 
 def process_ses_response(ses_request):
     client_name = 'SES'