[Vulkan] Remove old Vulkan code, change shaders directory, create empty Vulkan backend

src/xenia/ui/vulkan/premake5.lua

@@ -7,55 +7,10 @@ project("xenia-ui-vulkan")
   kind("StaticLib")
   language("C++")
   links({
-    "fmt",
     "xenia-base",
     "xenia-ui",
-    "xenia-ui-spirv",
-  })
-  defines({
-  })
-  includedirs({
-    project_root.."/third_party/vulkan/",
   })
   local_platform_files()
   files({
-    "shaders/bin/*.h",
+    "../shaders/bytecode/vulkan_spirv/*.h",
   })
-  removefiles({"*_demo.cc"})
-
-group("demos")
-project("xenia-ui-window-vulkan-demo")
-  uuid("97598f13-3177-454c-8e58-c59e2b6ede27")
-  kind("WindowedApp")
-  language("C++")
-  links({
-    "fmt",
-    "imgui",
-    "volk",
-    "xenia-base",
-    "xenia-ui",
-    "xenia-ui-spirv",
-    "xenia-ui-vulkan",
-  })
-  defines({
-  })
-  includedirs({
-    project_root.."/third_party/vulkan/",
-  })
-  files({
-    "../window_demo.cc",
-    "vulkan_window_demo.cc",
-    project_root.."/src/xenia/base/main_"..platform_suffix..".cc",
-  })
-  resincludedirs({
-    project_root,
-  })
-
-  filter("platforms:Linux")
-    links({
-      "X11",
-      "xcb",
-      "X11-xcb",
-      "GL",
-      "vulkan",
-    })