remove unused imports

src/registrar/fixtures/fixtures_domains.py

@@ -3,7 +3,6 @@ from django.utils import timezone
 import logging
 import random
 from faker import Faker
-from django.db import transaction
 
 from registrar.fixtures.fixtures_requests import DomainRequestFixture
 from registrar.fixtures.fixtures_users import UserFixture

src/registrar/fixtures/fixtures_portfolios.py

@@ -1,7 +1,6 @@
 import logging
 import random
 from faker import Faker
-from django.db import transaction
 
 from registrar.models import User, DomainRequest, FederalAgency
 from registrar.models.portfolio import Portfolio

src/registrar/fixtures/fixtures_requests.py

@@ -3,7 +3,6 @@ from django.utils import timezone
 import logging
 import random
 from faker import Faker
-from django.db import transaction
 
 from registrar.fixtures.fixtures_portfolios import PortfolioFixture
 from registrar.fixtures.fixtures_suborganizations import SuborganizationFixture

src/registrar/fixtures/fixtures_suborganizations.py

@@ -1,6 +1,5 @@
 import logging
 from faker import Faker
-from django.db import transaction
 
 from registrar.models.portfolio import Portfolio
 from registrar.models.suborganization import Suborganization

src/registrar/fixtures/fixtures_users.py

@@ -1,6 +1,5 @@
 import logging
 from faker import Faker
-from django.db import transaction
 
 from registrar.models import (
     User,