staging:rtl8192u: Remove commented out code - Style

Remove commented out sections of code, specifically for a structure,
QOS_DL_RECORD, which no longer exists in the module.

This change is a coding style change which should have no impact on
runtime code execution.

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