SW: Remove pre-release software warning

source/sw/src/game.cpp

@@ -3634,8 +3634,6 @@ int32_t app_main(int32_t argc, char const * const * argv)
 
     SW_ScanGroups();
 
-    wm_msgbox("Pre-Release Software Warning", "%s is not ready for public use. Proceed with caution!", AppProperName);
-
 #ifdef STARTUP_SETUP_WINDOW
     if (i < 0 || CommandSetup || (ud_setup.ForceSetup && !g_noSetup))
     {