chore(mypy): use newly available unused-ignore error code

deptry/core.py

@@ -177,7 +177,7 @@ def _get_stdlib_modules() -> frozenset[str]:
         if sys.version_info[:2] >= (3, 10):
             return sys.stdlib_module_names
 
-        try:  # type: ignore[unreachable]
+        try:  # type: ignore[unreachable, unused-ignore]
             return STDLIBS_PYTHON[f"{sys.version_info[0]}{sys.version_info[1]}"]
         except KeyError as e:
             raise UnsupportedPythonVersionError((sys.version_info[0], sys.version_info[1])) from e

pyproject.toml

@@ -92,16 +92,6 @@ warn_unreachable = true
 pretty = true
 show_error_codes = true
 
-# Ignore warnings for unused ignores because of https://github.com/python/mypy/issues/8823.
-# In some Python versions, we can end up with backport modules being untyped, while they are typed on others.
-[[tool.mypy.overrides]]
-module = [
-    "deptry.core",
-    "scripts.generate_stdlibs",
-    "tests.unit.test_core",
-]
-warn_unused_ignores = false
-
 [tool.deptry]
 extend_exclude = [
     "docs",

scripts/generate_stdlibs.py

@@ -91,7 +91,7 @@ def write_stdlibs_file(stdlib_python: dict[str, list[str]]) -> None:
     )
 
     with OUTPUT_PATH.open("w+") as stdlib_file:
-        stdlib_file.write(ast.unparse(node))  # type: ignore[attr-defined]
+        stdlib_file.write(ast.unparse(node))  # type: ignore[attr-defined, unused-ignore]
 
 
 if __name__ == "__main__":

tests/unit/test_core.py

@@ -105,7 +105,7 @@ def test__get_stdlib_packages_without_stdlib_module_names() -> None:
 
 @pytest.mark.skipif(sys.version_info < (3, 10), reason="only Python >= 3.10 has sys.stdlib_module_names")
 def test__get_stdlib_packages_with_stdlib_module_names() -> None:
-    assert Core._get_stdlib_modules() == sys.stdlib_module_names  # type: ignore[attr-defined]
+    assert Core._get_stdlib_modules() == sys.stdlib_module_names  # type: ignore[attr-defined, unused-ignore]
 
 
 @pytest.mark.parametrize(
@@ -123,7 +123,7 @@ def test__get_stdlib_packages_with_stdlib_module_names() -> None:
 def test__get_stdlib_packages_with_stdlib_module_names_future_version(version_info: tuple[int | str, ...]) -> None:
     """Test that future versions of Python not yet tested on the CI will also work."""
     with mock.patch("sys.version_info", (sys.version_info[0], sys.version_info[1] + 1, 0)):
-        assert Core._get_stdlib_modules() == sys.stdlib_module_names  # type: ignore[attr-defined]
+        assert Core._get_stdlib_modules() == sys.stdlib_module_names  # type: ignore[attr-defined, unused-ignore]
 
 
 @pytest.mark.parametrize(