remove unused imports

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

vulnerabilities/models.py

@@ -26,7 +26,6 @@
 from django.db.models.functions import Length
 from django.db.models.functions import Trim
 from django.urls import reverse
-from django.utils import timezone
 from packageurl import PackageURL
 from packageurl.contrib.django.models import PackageURLMixin
 from packageurl.contrib.django.models import PackageURLQuerySet
@@ -40,7 +39,6 @@
 from vulnerabilities.severity_systems import SCORING_SYSTEMS
 from vulnerabilities.utils import build_vcid
 from vulnerabilities.utils import remove_qualifiers_and_subpath
-from vulnerablecode import __version__ as vulnerablecode_version
 
 logger = logging.getLogger(__name__)