Vulkan: Remove unnecessary barrier in image -> buffer copy There was already a changeLayout call that inserted an imageBarrier. A TRANSFER_SRC to TRANSFER_SRC barrier was unnecessarily (and manually) added afterwards that was pointless. Bug: angleproject:3816 Change-Id: I8177487fc843fa5869c7b5063c74602933a81d58 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1929270 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Sunny Sun <sunny.sun@arm.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>