chore: delete duplicate code from snippets.py (#1481)

* chore: delete duplicate code from snippets.py

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

docs/snippets.py

@@ -164,66 +164,6 @@ def test_create_partitioned_table(client, to_delete):
         "https://github.com/GoogleCloudPlatform/google-cloud-python/issues/5589"
     )
 )
-def test_manage_table_labels(client, to_delete):
-    dataset_id = "label_table_dataset_{}".format(_millis())
-    table_id = "label_table_{}".format(_millis())
-    project = client.project
-    dataset_ref = bigquery.DatasetReference(project, dataset_id)
-    dataset = bigquery.Dataset(dataset_ref)
-    client.create_dataset(dataset)
-    to_delete.append(dataset)
-
-    table = bigquery.Table(dataset.table(table_id), schema=SCHEMA)
-
-    labels = {"color": "green"}
-    table.labels = labels
-    table = client.create_table(table)
-
-    # TODO(Mattix23): After code sample is updated from cloud.google.com delete this
-
-    # [START bigquery_get_table_labels]
-    # from google.cloud import bigquery
-    # client = bigquery.Client()
-    # dataset_id = 'my_dataset'
-    # table_id = 'my_table'
-
-    project = client.project
-    dataset_ref = bigquery.DatasetReference(project, dataset_id)
-    table_ref = dataset_ref.table(table_id)
-    table = client.get_table(table_ref)  # API Request
-
-    # View table labels
-    print("Table ID: {}".format(table_id))
-    print("Labels:")
-    if table.labels:
-        for label, value in table.labels.items():
-            print("\t{}: {}".format(label, value))
-    else:
-        print("\tTable has no labels defined.")
-    # [END bigquery_get_table_labels]
-    assert table.labels == labels
-
-    # TODO(Mattix23): After code sample is updated from cloud.google.com delete this
-
-    # [START bigquery_delete_label_table]
-    # from google.cloud import bigquery
-    # client = bigquery.Client()
-    # project = client.project
-    # dataset_ref = bigquery.DatasetReference(project, dataset_id)
-    # table_ref = dataset_ref.table('my_table')
-    # table = client.get_table(table_ref)  # API request
-
-    # This example table starts with one label
-    assert table.labels == {"color": "green"}
-    # To delete a label from a table, set its value to None
-    table.labels["color"] = None
-
-    table = client.update_table(table, ["labels"])  # API request
-
-    assert table.labels == {}
-    # [END bigquery_delete_label_table]
-
-
 @pytest.mark.skip(
     reason=(
         "update_table() is flaky "