perf: code (#9044)

Co-authored-by: feng <1304903146@qq.com>

apps/acls/serializers/login_acl.py

@@ -53,6 +53,3 @@ class LoginACLSerializer(BulkModelSerializer):
 
     def get_rules_serializer(self):
         return RuleSerializer()
-
-    def get_reviewers_display(self, obj):
-        return ','.join([str(user) for user in obj.reviewers.all()])

apps/assets/serializers/mixin.py

@@ -1,11 +0,0 @@
-from rest_framework import serializers
-from django.utils.translation import gettext_lazy as _
-
-
-class CategoryDisplayMixin(serializers.Serializer):
-    category_display = serializers.ReadOnlyField(
-        source='get_category_display', label=_("Category display")
-    )
-    type_display = serializers.ReadOnlyField(
-        source='get_type_display', label=_("Type display")
-    )