d3d9: Remove D3D9GetSWInfo.

dlls/d3d9/d3d9.spec

@@ -12,5 +12,3 @@
 @ stdcall DebugSetMute()
 @ stdcall Direct3DCreate9(long)
 @ stdcall Direct3DCreate9Ex(long ptr)
-
-@ stdcall D3D9GetSWInfo()

dlls/d3d9/d3d9_main.c

@@ -38,11 +38,6 @@ WINE_DEFAULT_DEBUG_CHANNEL(d3d9);
 
 static int D3DPERF_event_level = 0;
 
-HRESULT WINAPI D3D9GetSWInfo(void) {
-    FIXME("(void): stub\n");
-    return 0;
-}
-
 void WINAPI DebugSetMute(void) {
     /* nothing to do */
 }