sti: StiCreateInstance doesn't need its own implementation.

dlls/sti/sti.spec

@@ -2,6 +2,6 @@
 @ stdcall -private DllGetClassObject(ptr ptr ptr)
 @ stdcall -private DllRegisterServer()
 @ stdcall -private DllUnregisterServer()
-@ stdcall StiCreateInstance(ptr long ptr ptr)
+@ stdcall StiCreateInstance(ptr long ptr ptr) StiCreateInstanceW
 @ stdcall StiCreateInstanceA(ptr long ptr ptr)
 @ stdcall StiCreateInstanceW(ptr long ptr ptr)

dlls/sti/sti_main.c

@@ -173,14 +173,6 @@ HRESULT WINAPI DllCanUnloadNow( void )
 }
 
 /******************************************************************************
- *           StiCreateInstance   (STI.@)
- */
-HRESULT WINAPI StiCreateInstance( HINSTANCE hinst, DWORD dwVer, PSTIW *ppSti, LPUNKNOWN pUnkOuter )
-{
-    return STG_E_UNIMPLEMENTEDFUNCTION;
-}
-
-/******************************************************************************
  *           StiCreateInstanceA   (STI.@)
  */
 HRESULT WINAPI StiCreateInstanceA( HINSTANCE hinst, DWORD dwVer, PSTIA *ppSti, LPUNKNOWN pUnkOuter )