staging: rtl8723bs: remove unnecessary adapter

The if2 adapter is defined in rtw_dvr_init() and in the dvobj_priv
structure but never used anywhere in the driver. This will remove all
definitions of if2

Signed-off-by: Bryan Brattlof <hello@bryanbrattlof.com>
Link: https://lore.kernel.org/r/20210412172147.43509-1-hello@bryanbrattlof.com


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