Try removing boto package again

app/v2/notifications/post_notifications.py

@@ -3,7 +3,7 @@ import functools
 import uuid
 from datetime import datetime
 
-from boto.exception import SQSError
+import botocore
 from flask import abort, current_app, jsonify, request
 from gds_metrics import Histogram
 from notifications_utils.recipients import try_validate_and_format_phone_number
@@ -232,7 +232,7 @@ def process_sms_or_email_notification(
                 reply_to_text=reply_to_text
             )
             return resp
-        except SQSError:
+        except botocore.exceptions.ClientError:
             # if SQS cannot put the task on the queue, it's probably because the notification body was too long and it
             # went over SQS's 256kb message limit. If so, we
             current_app.logger.info(

requirements-app.txt

@@ -1,7 +1,6 @@
 # Run `make freeze-requirements` to update requirements.txt
 # with package version changes made in requirements-app.txt
 
-boto==2.49.0 # notify-api crashes in PaaS without this
 cffi==1.14.5
 celery[sqs]==5.1.2
 docopt==0.6.2

requirements.txt

@@ -3,7 +3,6 @@
 # Run `make freeze-requirements` to update requirements.txt
 # with package version changes made in requirements-app.txt
 
-boto==2.49.0 # notify-api crashes in PaaS without this
 cffi==1.14.5
 celery[sqs]==5.1.2
 docopt==0.6.2

tests/app/v2/notifications/test_post_notifications.py

@@ -2,8 +2,8 @@ import uuid
 from unittest import mock
 from unittest.mock import call
 
+import botocore
 import pytest
-from boto.exception import SQSError
 from flask import current_app, json
 
 from app.dao import templates_dao
@@ -1074,7 +1074,7 @@ def test_post_notifications_saves_email_or_sms_normally_if_saving_to_queue_fails
 ):
     save_task = mocker.patch(
         f"app.celery.tasks.save_api_{notification_type}.apply_async",
-        side_effect=SQSError({'some': 'json'}, 'some opname')
+        side_effect=botocore.exceptions.ClientError({'some': 'json'}, 'some opname')
     )
     mock_send_task = mocker.patch(f'app.celery.provider_tasks.deliver_{notification_type}.apply_async')