Revert "AMD people: have at it. I ain't gonna guarantee it'll work, though."

This reverts commit 8c0614b202.

Recent changes to generated shaders require GLSL 4.50.

src/xenia/ui/gl/gl_context.cc

@@ -287,8 +287,8 @@ void GLContext::AssertExtensionsPresent() {
       reinterpret_cast<const char*>(glGetString(GL_SHADING_LANGUAGE_VERSION));
   std::string glsl_version(glsl_version_raw);
   if (glsl_version.find("4.50") != 0) {
-    XELOGW("GLSL version reported as %s; you may have a bad time!",
-           glsl_version_raw);
+    FatalGLError("OpenGL GLSL version 4.50 is required.");
+    return;
   }
 
   if (!GLEW_ARB_bindless_texture || !glMakeTextureHandleResidentARB) {