chore: removed unneeded code

to get test coverage back to 100% for this file.

openedx_tagging/core/tagging/rest_api/v1/serializers.py

@@ -144,7 +144,7 @@ class ObjectTagUpdateQueryParamsSerializer(serializers.Serializer):  # pylint: d
     )
 
 
-class TagDataSerializer(serializers.Serializer):
+class TagDataSerializer(serializers.Serializer):  # pylint: disable=abstract-method
     """
     Serializer for TagData dicts. Also can serialize Tag instances.
 
@@ -194,12 +194,6 @@ def to_representation(self, instance: TagData | Tag) -> dict:
             data["parent_value"] = instance.parent.value if instance.parent else None
         return data
 
-    def update(self, instance, validated_data):
-        raise RuntimeError('`update()` is not supported by the TagData serializer.')
-
-    def create(self, validated_data):
-        raise RuntimeError('`create()` is not supported by the TagData serializer.')
-
 
 class TaxonomyTagCreateBodySerializer(serializers.Serializer):  # pylint: disable=abstract-method
     """
@@ -273,7 +267,7 @@ class Meta:
         ]
 
 
-class TaxonomyImportPlanResponseSerializer(serializers.Serializer):
+class TaxonomyImportPlanResponseSerializer(serializers.Serializer):  # pylint: disable=abstract-method
     """
     Serializer for the response of the Taxonomy Import Plan request
     """
@@ -290,9 +284,3 @@ def get_plan(self, obj):
             return plan.plan()
 
         return None
-
-    def update(self, instance, validated_data):
-        raise RuntimeError('`update()` is not supported by the TagImportTask serializer.')
-
-    def create(self, validated_data):
-        raise RuntimeError('`create()` is not supported by the TagImportTask serializer.')