mt76: usb: remove wake logic in mt76u_status_worker

Similar to mmio code path, remove wake logic in mt76u_status_worker handler.
Starting from commit 90d494c9

 ("mt76: improve tx queue stop/wake")', the
wake queue logic on the usb status path is no longer necessary since the hw
queues are no longer stopped on the mt76 tx path.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/00009bf0cfdc9565e4432cad3ed51888c667c25d.1607164041.git.lorenzo@kernel.org