Vulkan: Remove redundant needs-flush check in glClientWaitSync `SyncHelper::prepareForClientWait` calls `SyncHelper::getStatus`, which already causes pending flushes in the share context to be performed. The second call in `SyncHelper::prepareForClientWait` was redundant and a no-op. Bug: b/362604439 Change-Id: I125e3e5773d29976fe916c3e2f78733f12c72ed0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5823558 Commit-Queue: Igor Nazarov <i.nazarov@samsung.com> Reviewed-by: Igor Nazarov <i.nazarov@samsung.com> Reviewed-by: Charlie Lao <cclao@google.com> Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>