lint: Enable flake8-unused-arguments

Signed-off-by: Jussi Kukkonen <jkukkonen@google.com>

Author: jku

pyproject.toml

@@ -83,6 +83,7 @@ line-length=80
 [tool.ruff.lint]
 select = [
     "A",   # flake8-builtins
+    "ARG", # flake8-unused-arguments
     "B",   # flake8-bugbear
     "BLE", # flake8-blind-except
     "C4",  # flake8-comprehensions

tests/test_api.py

@@ -255,7 +255,7 @@ def from_priv_key_uri(
             def public_key(self) -> Key:
                 raise RuntimeError("Not a real signer")
 
-            def sign(self, payload: bytes) -> Signature:
+            def sign(self, _payload: bytes) -> Signature:
                 raise RuntimeError("signing failed")
 
         failing_signer = FailingSigner()

tests/test_updater_ng.py

@@ -281,7 +281,7 @@ def test_length_hash_mismatch(self) -> None:
 
     def test_updating_root(self) -> None:
         # Bump root version, resign and refresh
-        self._modify_repository_root(lambda root: None, bump_version=True)
+        self._modify_repository_root(lambda _: None, bump_version=True)
         self.updater.refresh()
         self.assertEqual(self.updater._trusted_set.root.version, 2)