fix all flake8 issues

mesonbuild/compilers/compilers.py

@@ -12,9 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import abc, contextlib, enum, os.path, re, tempfile, shlex
-from typing import List, Optional, Tuple
-from pathlib import Path
+import contextlib, enum, os.path, re, tempfile, shlex
+from typing import Optional, Tuple
 
 from ..linkers import StaticLinker
 from .. import coredata
@@ -22,7 +21,7 @@ from .. import mlog
 from .. import mesonlib
 from ..mesonlib import (
     EnvironmentException, MachineChoice, MesonException, OrderedSet,
-    version_compare, Popen_safe
+    Popen_safe
 )
 from ..envconfig import (
     Properties,

mesonbuild/interpreter.py

@@ -21,7 +21,7 @@ from . import optinterpreter
 from . import compilers
 from .wrap import wrap, WrapMode
 from . import mesonlib
-from .mesonlib import FileMode, MachineChoice, PerMachine, Popen_safe, listify, extract_as_list, has_path_sep
+from .mesonlib import FileMode, MachineChoice, Popen_safe, listify, extract_as_list, has_path_sep
 from .dependencies import ExternalProgram
 from .dependencies import InternalDependency, Dependency, NotFoundDependency, DependencyException
 from .interpreterbase import InterpreterBase
@@ -40,7 +40,7 @@ from collections import namedtuple
 from itertools import chain
 from pathlib import PurePath
 import functools
-from typing import Sequence, List, Union, Optional, Iterator, Dict, Any
+from typing import Sequence, List, Union, Optional, Dict, Any
 
 import importlib
 

mesonbuild/scripts/dist.py

@@ -21,7 +21,6 @@ import subprocess
 import pickle
 import hashlib
 import tarfile, zipfile
-import tempfile
 from glob import glob
 from mesonbuild.environment import detect_ninja
 from mesonbuild.mesonlib import windows_proof_rmtree