Revert "Vulkan: Define VK_USE_PLATFORM_XLIB_KHR" This reverts commit bedeb781e8ca8a57c31b56d28ba1cde983e5ba47. Reason for revert: <INSERT REASONING HERE> Original change's description: > Vulkan: Define VK_USE_PLATFORM_XLIB_KHR > > For vulkan x11 build need to define VK_USE_PLATFORM_XLIB_KHR. > > Bug: 1011068 > Change-Id: I1ff51a37618eb3a095bdf18e0615a3610225b6fc > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1863319 > Commit-Queue: Jamie Madill <jmadill@chromium.org> > Reviewed-by: Jamie Madill <jmadill@chromium.org> TBR=penghuang@chromium.org,tobine@google.com,jmadill@chromium.org Change-Id: I6cf135e36603ea01bc418fd6f7ce7f131890531e No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: 1011068 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1864579 Reviewed-by: Tobin Ehlis <tobine@google.com> Commit-Queue: Tobin Ehlis <tobine@google.com>