Vulkan: Remove loader logging message in RendererVk. This was causing issues with a Chrome test. Bug: chromium:1230474 Change-Id: I0e5e3df5c9ad5774d6f5a2b41f4f1429000fe81e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3035247 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>