fix: remove "future" dependency (#542)

* chore: remove "future" dependency

* 🦉 Updates from OwlBot post-processor

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

---------

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

Author: 3 people

dev_requirements.txt

@@ -1,6 +1,5 @@
 sqlalchemy>=2.0.15,<2.1.0
 google-cloud-bigquery>=1.6.0
-future==0.18.2
 pytest===6.2.5
 pytest-flake8===1.1.0  # versions 1.1.1 and above require pytest 7
 pytz==2023.3

samples/snippets/requirements.txt

@@ -1,7 +1,6 @@
 alembic==1.11.1
 certifi==2023.5.7
 charset-normalizer==3.1.0
-future==0.18.2
 geoalchemy2==0.13.3
 google-api-core[grpc]==2.11.0
 google-auth==2.19.1

setup.py

@@ -102,7 +102,6 @@ def readme():
         "google-cloud-bigquery>=2.25.2,<4.0.0dev",
         "packaging",
         "sqlalchemy>=1.2.0,<2.0.0dev",
-        "future",
     ],
     extras_require=extras,
     python_requires=">=3.7, <3.12",

sqlalchemy_bigquery/base.py

@@ -19,9 +19,6 @@
 
 """Integration between SQLAlchemy and BigQuery."""
 
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from decimal import Decimal
 import random
 import operator