staging: vc04_services: Drop completed TODO item

The memory barrier comments are added in
commit f6c99d8 ("staging: vchiq_arm: Add missing memory barrier comments")

Drop the respective item from the TODO list.

Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20240412075743.60712-12-umang.jain@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Umang Jain

drivers/staging/vc04_services/interface/TODO

@@ -28,13 +28,6 @@ variables avoided.
 A short top-down description of this driver's architecture (function of
 kthreads, userspace, limitations) could be very helpful for reviewers.
 
-* Review and comment memory barriers
-
-There is a heavy use of memory barriers in this driver, it would be very
-beneficial to go over all of them and, if correct, comment on their merits.
-Extra points to whomever confidently reviews the remote_event_*() family of
-functions.
-
 * Reformat core code with more sane indentations
 
 The code follows the 80 characters limitation yet tends to go 3 or 4 levels of