staging: rtl8192e: Remove checks of pointer to rtllib.. and ScanOpera..

staging: rtl8192e: Remove checks of pointer to rtllib.. and ScanOpera..

Function pointers of rtllib_ips_leave and ScanOperationBackupHandler is
set while executing the probe function. Therefore a NULL pointer check is
not required. Remove checks as it is dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/8b01cbfaad2db4666b98bfeae29dd429d8c6cd07.1677345331.git.philipp.g.hortmann@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>