staging:rtl8188eu: Remove unnecessary variable assignments

This patch removes unnecessary variable assignments which are
assigned immediately after the first initialization.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>