staging: rtl8192e: Remove unused if clauses in rtl92e_set_wireless_mode

Equation (support_mode & WIRELESS_MODE_N_24G) will always be true. Remove
resulting dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/359ed203ab08afe5c2f449f40d2958868b4e55b4.1679949171.git.philipp.g.hortmann@gmail.com


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