Older version of `get_write_buffer_limits` overwrites the new implementation

[csuriano23]

Bug report

In python 3.11 asyncio module, a new version of set_write_buffer_limits and get_write_buffer_limits has been introduced for SSL (sslproto.py), that doesn't delegate to the transport layer. However the old version of get_write_buffer_limits is still inplace, overwriting the new version

Your environment

CPython versions tested on:

• 3.10.x (no bug)
• 3.11.0

Operating system and architecture:

• Darwin, MacOS ARM M1

• PR: gh-99277: remove older version of get_write_buffer_limits #99280

• PR: [3.11] gh-99277: remove older version of get_write_buffer_limits (GH-99280) #99338