staging:rtl8192u: Remove unused QOS definitions - Style

Remove the unused QOS related types.

Since definitions are not used simply remove from code. This change is
a coding style change and should not impact runtime execution.

Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>