staging: rtl8192e: Remove unused variable DM_Type

DM_Type is initialized and then never evaluated. Remove resulting dead
code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/380fa2767d1f1cc32a5ad271057683d67ceb1b6f.1674071236.git.philipp.g.hortmann@gmail.com


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