Remove unused imports

flit/install.py

@@ -16,7 +16,6 @@
 
 from flit_core import common
 from .config import read_flit_config
-from .wheel import WheelBuilder
 from ._get_dirs import get_dirs
 
 log = logging.getLogger(__name__)

flit_core/flit_core/config.py

@@ -4,7 +4,6 @@
 import logging
 import os
 import os.path as osp
-from os.path import isabs
 from pathlib import Path
 import re
 

tests/test_sdist.py

@@ -2,7 +2,7 @@
 from os.path import join as pjoin
 from pathlib import Path
 import pytest
-from shutil import which, copy, copytree
+from shutil import which, copytree
 import sys
 import tarfile
 from tempfile import TemporaryDirectory

tests/test_tomlify.py

@@ -1,10 +1,8 @@
-import os
 from pathlib import Path
 try:
     import tomllib
 except ImportError:
     import tomli as tomllib
-from shutil import copy
 from testpath import assert_isfile
 
 from flit import tomlify

tests/test_upload.py

@@ -3,7 +3,6 @@
 import os
 import io
 import pathlib
-import sys
 
 import pytest
 import responses