staging: rtl8192u: Remove broken driver

staging: rtl8192u: Remove broken driver

Tests on rtl8192u hardware have shown that this driver is broken since
2016. Remove broken driver. Find fix for two bugs in second link.

Link: https://lore.kernel.org/lkml/db98d9ac-7650-4a72-8eb9-4def1f17ea0d@app.fastmail.com/
Link: https://lore.kernel.org/lkml/cover.1697089416.git.philipp.g.hortmann@gmail.com/
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20231014211051.GA29518@matrix-ESPRIMO-P710
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>