fix some flake8 violations for unused imports

And one undefined T.cast name in a file that isn't yet mypy-ready
anyway.

4 files changed, 4 insertions, 5 deletions

diff --git a/mesonbuild/dependencies/cmake.py b/mesonbuild/dependencies/cmake.py
index dcbe5df..691d402 100644
--- a/mesonbuild/dependencies/cmake.py
+++ b/mesonbuild/dependencies/cmake.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from .base import ExternalDependency, DependencyException, DependencyTypeName
-from ..mesonlib import is_windows, MesonException, OptionKey, PerMachine, stringlistify, extract_as_list
+from ..mesonlib import is_windows, MesonException, PerMachine, stringlistify, extract_as_list
 from ..cmake import CMakeExecutor, CMakeTraceParser, CMakeException, CMakeToolchain, CMakeExecScope, check_cmake_args, CMakeTarget, resolve_cmake_trace_targets, cmake_is_debug
 from .. import mlog
 import importlib.resources
diff --git a/mesonbuild/interpreter/primitives/string.py b/mesonbuild/interpreter/primitives/string.py
index a5fc992..9cd51b4 100644
--- a/mesonbuild/interpreter/primitives/string.py
+++ b/mesonbuild/interpreter/primitives/string.py
@@ -3,7 +3,6 @@
 
 import re
 import os
-from pathlib import PurePath
 
 import typing as T
 
diff --git a/mesonbuild/modules/__init__.py b/mesonbuild/modules/__init__.py
index 8fe61c6..73e22ff 100644
--- a/mesonbuild/modules/__init__.py
+++ b/mesonbuild/modules/__init__.py
@@ -14,15 +14,15 @@
 
 # This file contains the base representation for import('modname')
 
-import os
 import typing as T
 
 from .. import build, mesonlib
-from ..mesonlib import relpath, HoldableObject, MachineChoice, OptionKey
+from ..mesonlib import relpath, HoldableObject, MachineChoice
 from ..interpreterbase.decorators import noKwargs, noPosargs
 
 if T.TYPE_CHECKING:
     from ..interpreter import Interpreter
+    from ..interpreter.interpreterobjects import MachineHolder
     from ..interpreterbase import TYPE_var, TYPE_kwargs
     from ..programs import ExternalProgram
     from ..wrap import WrapMode
diff --git a/mesonbuild/optinterpreter.py b/mesonbuild/optinterpreter.py
index 64c4af2..6155c2f 100644
--- a/mesonbuild/optinterpreter.py
+++ b/mesonbuild/optinterpreter.py
@@ -21,7 +21,7 @@ from . import mparser
 from . import mlog
 from .interpreterbase import FeatureNew, typed_pos_args, typed_kwargs, ContainerTypeInfo, KwargInfo, permittedKwargs
 if T.TYPE_CHECKING:
-    from .interpreterbase import TV_func, TYPE_var, TYPE_kwargs
+    from .interpreterbase import TYPE_var, TYPE_kwargs
     from typing_extensions import TypedDict
     FuncOptionArgs = TypedDict('FuncOptionArgs', {
         'type': str,