staging: rtl8192e: Remove unused variables ntotalfrag and Seq_Num

Remove unused variables ntotalfrag and Seq_Num as they are set and never
evaluated. Remove resulting local variables seq, sc and hdr as well.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/4a3f2d217631076ee9994b46f8672eceaea8568c.1708461563.git.philipp.g.hortmann@gmail.com


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