[Python-Dev] Deprecating the "u" string literal prefix

The 'u" string literal prefix was removed in 3.0 and reintroduced in 3.3 to help writing the code compatible with Python 2 and 3 [1]. After the dead of Python 2.7 we will remove some deprecated features kept for compatibility with 2.7. When we are going to deprecate and remove the "u" prefix? [1] https://www.python.org/dev/peps/pep-0414/