Remove unused imports

Pre-commit identified a number of unused imports; this commit removes all
of them.

Author: larsks

bd.py

@@ -1,5 +1,4 @@
 from typing import cast
-import typing_extensions
 from typing_extensions import override
 
 import argparse

bj.py

@@ -1,4 +1,3 @@
-import typing_extensions
 from typing_extensions import override
 
 import argparse

bl.py

@@ -1,4 +1,3 @@
-import typing_extensions
 from typing_extensions import override
 from typing import cast
 

bp.py

@@ -1,5 +1,4 @@
 from typing import cast
-import typing_extensions
 from typing_extensions import override
 
 import argparse

bps.py

@@ -1,4 +1,3 @@
-import typing_extensions
 from typing_extensions import override
 from typing import cast
 from collections import defaultdict

bq.py

@@ -1,4 +1,3 @@
-import typing_extensions
 from typing_extensions import override
 
 import argparse

br.py

@@ -1,5 +1,4 @@
 from typing import cast
-import typing_extensions
 from typing_extensions import override
 
 import argparse

tests/test_bd.py

@@ -4,7 +4,6 @@
 from contextlib import contextmanager
 
 import argparse
-from typing import Callable
 
 from bd import DeleteJobsCommand
 from tests.helpers import DictToObject

tests/test_bj.py

@@ -1,4 +1,3 @@
-import pytest
 from unittest import mock
 from contextlib import contextmanager