Reverts "[Impeller] enable ahb swapchain on emulators. (#54019)"

impeller/renderer/backend/vulkan/swapchain/swapchain_vk.cc

@@ -55,8 +55,11 @@ std::shared_ptr<SwapchainVK> SwapchainVK::Create(
     return nullptr;
   }
 
+  // TODO(147533): AHB swapchains on emulators are not functional.
+  const auto emulator = ContextVK::Cast(*context).GetDriverInfo()->IsEmulator();
+
   // Try AHB swapchains first.
-  if (AHBSwapchainVK::IsAvailableOnPlatform()) {
+  if (!emulator && AHBSwapchainVK::IsAvailableOnPlatform()) {
     auto ahb_swapchain = std::shared_ptr<AHBSwapchainVK>(new AHBSwapchainVK(
         context,             //
         window.GetHandle(),  //