fix: remove duplicate serializer

Author: brianjbuck-wgu

lms/djangoapps/instructor/views/serializers_v2.py

@@ -28,6 +28,7 @@
 from lms.djangoapps.discussion.django_comment_client.utils import has_forum_access
 from lms.djangoapps.instructor import permissions
 from lms.djangoapps.instructor.views.instructor_dashboard import get_analytics_dashboard_message
+from openedx.core.djangoapps.course_groups.rest_api.serializers import GroupSerializer
 from openedx.core.djangoapps.django_comment_common.models import FORUM_ROLE_ADMINISTRATOR
 from xmodule.modulestore.django import modulestore
 
@@ -477,31 +478,6 @@ class ORASummarySerializer(serializers.Serializer):
     final_grade_received = serializers.IntegerField()
 
 
-class GroupSerializer(serializers.Serializer):
-    """
-    Serializer for a single group within a content group configuration.
-
-    Groups represent cohorts that can be assigned different course content.
-    """
-
-    id = serializers.IntegerField(
-        help_text="Unique identifier for this group within the configuration"
-    )
-    name = serializers.CharField(
-        max_length=255,
-        help_text="Human-readable name of the group"
-    )
-    version = serializers.IntegerField(
-        help_text="Group version number (always 1 for current Group format)"
-    )
-    usage = serializers.ListField(
-        child=serializers.DictField(),
-        required=False,
-        default=list,
-        help_text="List of course units using this group for content restriction"
-    )
-
-
 class ContentGroupConfigurationSerializer(serializers.Serializer):
     """
     Serializer for a content group configuration (UserPartition with scheme='cohort').