Fixed a bunch of unused imports spotted with ruff

tests/conftest.py

@@ -7,7 +7,7 @@ import re
 import subprocess
 import tempfile
 import time
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from datasette import Event, hookimpl
 
 

tests/test_black.py

@@ -1,8 +1,6 @@
 import black
 from click.testing import CliRunner
 from pathlib import Path
-import pytest
-import sys
 
 code_root = Path(__file__).parent.parent
 

tests/test_cli.py

@@ -4,7 +4,6 @@ from .fixtures import (
     TestClient as _TestClient,
     EXPECTED_PLUGINS,
 )
-import asyncio
 from datasette.app import SETTINGS
 from datasette.plugins import DEFAULT_PLUGINS
 from datasette.cli import cli, serve
@@ -19,7 +18,6 @@ import pytest
 import sys
 import textwrap
 from unittest import mock
-import urllib
 
 
 def test_inspect_cli(app_client):

tests/test_cli_serve_get.py

@@ -1,4 +1,4 @@
-from datasette.cli import cli, serve
+from datasette.cli import cli
 from datasette.plugins import pm
 from click.testing import CliRunner
 import textwrap

tests/test_config_dir.py

@@ -3,11 +3,9 @@ import pathlib
 import pytest
 
 from datasette.app import Datasette
-from datasette.cli import cli
 from datasette.utils.sqlite import sqlite3
 from datasette.utils import StartupError
 from .fixtures import TestClient as _TestClient
-from click.testing import CliRunner
 
 PLUGIN = """
 from datasette import hookimpl

tests/test_internals_datasette.py

@@ -7,7 +7,6 @@ from datasette import Forbidden, Context
 from datasette.app import Datasette, Database
 from itsdangerous import BadSignature
 import pytest
-from typing import Optional
 
 
 @pytest.fixture

tests/test_plugins.py

@@ -1,6 +1,5 @@
 from bs4 import BeautifulSoup as Soup
 from .fixtures import (
-    app_client,
     app_client,
     make_app_client,
     TABLES,
@@ -9,14 +8,12 @@ from .fixtures import (
     TestClient as _TestClient,
 )  # noqa
 from click.testing import CliRunner
-from dataclasses import dataclass
 from datasette.app import Datasette
-from datasette import cli, hookimpl, Event, Permission
+from datasette import cli, hookimpl, Permission
 from datasette.filters import FilterArguments
 from datasette.plugins import get_plugins, DEFAULT_PLUGINS, pm
 from datasette.utils.sqlite import sqlite3
-from datasette.utils import CustomRow, StartupError
-from jinja2.environment import Template
+from datasette.utils import StartupError
 from jinja2 import ChoiceLoader, FileSystemLoader
 import base64
 import datetime

tests/test_table_html.py

@@ -1,4 +1,4 @@
-from datasette.app import Datasette, Database
+from datasette.app import Datasette
 from bs4 import BeautifulSoup as Soup
 from .fixtures import (  # noqa
     app_client,