staging: rtl8192e: Remove unused variable skb_aggQ

skb_aggQ is initialized, never used and purged. Remove resulting dead
code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/3197be3cb412eea1c662a5bec1b1afda2cee675d.1669156825.git.philipp.g.hortmann@gmail.com


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