fix: remove unused type ignore comment in _test_serdes.py

Author: pavel-kirienko

pydsdl/_test_serdes.py

@@ -104,7 +104,7 @@ class MockServiceType(ServiceType):
         deserialize(mock_service, bytes([0]))
 
     # Test 3: with_delimiter_header=True on non-delimited type raises ValueError
-    class MockStructureType(StructureType):  # type: ignore[misc]
+    class MockStructureType(StructureType):
         pass
 
     mock_struct = MockStructureType.__new__(MockStructureType)