Remove ThumbnailsMixin and remaining thumbnails fields

program/serializers.py

@@ -197,19 +197,6 @@ class HostLinkSerializer(serializers.ModelSerializer):
         fields = ("type", "url")
 
 
-class ThumbnailsMixin:
-    @staticmethod
-    def get_thumbnails(instance) -> List[str]:
-        """Returns thumbnails"""
-        thumbnails = []
-
-        if instance.image.name and THUMBNAIL_SIZES:
-            for size in THUMBNAIL_SIZES:
-                thumbnails.append(instance.image.crop[size].name)
-
-        return thumbnails
-
-
 class ImageSerializer(serializers.ModelSerializer):
     thumbnails = serializers.SerializerMethodField()
 
@@ -402,7 +389,6 @@ class ShowSerializer(serializers.HyperlinkedModelSerializer):
             "predecessor",
             "short_description",
             "slug",
-            "thumbnails",
             "topic",
             "type",
         ) + read_only_fields
@@ -704,7 +690,6 @@ class NoteSerializer(serializers.ModelSerializer):
             "slug",
             "summary",
             "tags",
-            "thumbnails",
             "timeslot",
             "title",
         ) + read_only_fields