staging: rtl8192e: Remove case customer_id = RT_CID_DLINK

customer_id is initialize to zero. Changing customer_id to RT_CID_DLINK
would not change the program execution as there is no equation for
RT_CID_DLINK. Remove useless code lines to increase readability.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/e4ecef11015c32c9909cd07e0939c4de53fd501a.1680427945.git.philipp.g.hortmann@gmail.com


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