Revert "tun/tap: add ptr_ring consume helper with netdev queue wakeup"

Revert "tun/tap: add ptr_ring consume helper with netdev queue wakeup"

This reverts commit d4c22d70d7253dd727c71484c58d504f6c630343.

There is no netdev queue left to wake after reverting
commit 1d6e569b7d0c ("tun/tap & vhost-net: avoid ptr_ring tail-drop
when a qdisc is present").

Signed-off-by: Simon Schippers <simon.schippers@tu-dortmund.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20260728092240.250257-5-simon.schippers@tu-dortmund.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>