[SDL2] On Win, build and link statically.

Keep using system lib dynamically on Unix.

src/xenia/app/premake5.lua

@@ -79,7 +79,6 @@ project("xenia-app")
 
   filter("platforms:Windows")
     links({
-      "delayimp", -- This library implements delayed loading on Windows, an MSVC exclusive feature.
       "xenia-apu-xaudio2",
       "xenia-gpu-d3d12",
       "xenia-hid-winkey",
@@ -87,11 +86,6 @@ project("xenia-app")
       "xenia-ui-d3d12",
     })
 
-  filter("platforms:Windows")
-    linkoptions({
-      "/DELAYLOAD:SDL2.dll",  -- SDL is not mandatory on Windows, implementations using native APIs are prefered.
-    })
-
   filter("platforms:Windows")
     -- Only create the .user file if it doesn't already exist.
     local user_file = project_root.."/build/xenia-app.vcxproj.user"