Utils: Remove function wrapper

This was an intentional, time-limited workaround that has
served its purpose now that we require C++11.

Change-Id: I96ece9c21bd405d281fd381bd9b87edc00c5ee84
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>