[ruff] Enable RET and fix all violations (#9929)

tests/script/test_clang_tidy_hash.py

@@ -69,7 +69,7 @@ def test_calculate_clang_tidy_hash() -> None:
         def read_file_mock(path: Path) -> bytes:
             if ".clang-tidy" in str(path):
                 return clang_tidy_content
-            elif "platformio.ini" in str(path):
+            if "platformio.ini" in str(path):
                 return platformio_content
             return b""
 

tests/script/test_helpers.py

@@ -315,9 +315,8 @@ def test_local_development_no_remotes_configured(monkeypatch: MonkeyPatch) -> No
         def side_effect_func(*args):
             if args == ("git", "remote"):
                 return "origin\nupstream\n"
-            else:
-                # All merge-base attempts fail
-                raise Exception("Command failed")
+            # All merge-base attempts fail
+            raise Exception("Command failed")
 
         mock_output.side_effect = side_effect_func