Update account_tests.py

Importing `client` no longer needed with the addition of conftest.py

Author: katkaypettitt

app/ch14_testing/final/tests/account_tests.py

@@ -2,7 +2,7 @@
 
 from pypi_org.data.users import User
 from pypi_org.viewmodels.account.register_viewmodel import RegisterViewModel
-from tests.test_client import flask_app, client
+from tests.test_client import flask_app
 import unittest.mock