staging: rtl8192e: Remove delayed_work start_ibss_wq

Remove delayed_work start_ibss_wq and the related functions which are not
needed anymore.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/805447a41feffb9da7d82830868dc1d47f9aa737.1695387832.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>