pstorec: Use --prefer-native instead of DLL_WINE_PREATTACH.

dlls/pstorec/Makefile.in

 MODULE    = pstorec.dll
 IMPORTS   = uuid
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	pstorec.c

dlls/pstorec/pstorec.c

@@ -43,21 +43,6 @@ static inline PStore_impl *impl_from_IPStore(IPStore *iface)
     return CONTAINING_RECORD(iface, PStore_impl, IPStore_iface);
 }
 
-BOOL WINAPI DllMain(HINSTANCE hinst, DWORD fdwReason, LPVOID fImpLoad)
-{
-    TRACE("%p %x %p\n", hinst, fdwReason, fImpLoad);
-
-    switch (fdwReason)
-    {
-    case DLL_WINE_PREATTACH:
-        return FALSE;  /* prefer native version */
-    case DLL_PROCESS_ATTACH:
-        DisableThreadLibraryCalls(hinst);
-        break;
-    }
-    return TRUE;
-}
-
 /**************************************************************************
  *  IPStore->QueryInterface
  */