Vulkan: Remove unnecessary perfetto trace in BufferVk::mapRange There is not much usefulness to know there is mapRange call. The more meaningful place is where we end up waiting for GPU to finish which we already have the perfetto trace in SharedFence::wait. The exitsing of this trace made a lot of noise in trace since app tends to call this a lot and there are many tiny lines on the trace. Bug: None Change-Id: I83fbbba827361d068b521bdfb2bc187865d11012 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5841067 Commit-Queue: Charlie Lao <cclao@google.com> Reviewed-by: Yuxin Hu <yuxinhu@google.com>