Revert "Advertise support for BT709 in the WSI"

This reverts commit 737b5b495f7b65787bd676187dd9cca178386498.

Reason for revert: needs to land in aosp

Change-Id: I65d740d29096ff6724ed0eff5d9fb83112be6de5
Merged-In: I9ad64d7d8b21cd68c071dc90f7d032671096b0da
diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index 5fdee21..f42c4f0 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -760,8 +760,7 @@
     // We must support R8G8B8A8
     std::vector<VkSurfaceFormatKHR> all_formats = {
         {VK_FORMAT_R8G8B8A8_UNORM, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR},
-        {VK_FORMAT_R8G8B8A8_SRGB, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR},
-        {VK_FORMAT_R8G8B8A8_UNORM, VK_COLOR_SPACE_BT709_LINEAR_EXT}};
+        {VK_FORMAT_R8G8B8A8_SRGB, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR}};
 
     if (wide_color_support) {
         all_formats.emplace_back(VkSurfaceFormatKHR{