Remove todo comment of resolved issue

extra_tests/snippets/syntax_non_utf8.py

@@ -5,8 +5,7 @@ from testutils import assert_raises
 
 dir_path = os.path.dirname(os.path.realpath(__file__))
 
-# TODO: RUSTPYTHON, RustPython raises a SyntaxError here, but cpython raise a ValueError
-error = SyntaxError if platform.python_implementation() == 'RustPython' else ValueError
+error = ValueError
 with assert_raises(error):
     with open(os.path.join(dir_path , "non_utf8.txt")) as f:
         eval(f.read())