staging: rtl8723bs: remove empty for cycles

remove for-cycles left empty after RT_TRACE deletion
and unused index variables

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/09875f599705d8f50af3511fa6bfaa54b9446a86.1617640221.git.fabioaiuto83@gmail.com


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