remove nvidia/amd exports (they don't work...)

ddraw.def

@@ -9,6 +9,4 @@ EXPORTS
     DirectDrawEnumerateExW                    @13
     DirectDrawEnumerateW                      @14
     GameHandlesClose                          DATA
-    NvOptimusEnablement                       DATA
-    AmdPowerXpressRequestHighPerformance      DATA
     pvBmpBits = FakePrimarySurface            DATA

src/dllmain.c

@@ -10,9 +10,6 @@
 #include "directinput.h"
 #include "hook.h"
 
-// exports to force usage of discrete high performance graphics device
-DWORD NvOptimusEnablement = 1;
-DWORD AmdPowerXpressRequestHighPerformance = 1;
 
 // export for cncnet cnc games
 BOOL GameHandlesClose;