As I understood, he was trying to get consistent delay for different framerates, but was thinking a little bit ahead and tried to use delta time for it. I’ve just pointed out that it’s redundant. I think, your solution is correct but is a workaround not answer to the question.
At the same time he wanted to learn more about Delta Time and usage of it, as can be seen on his comment to your answer. So I pointed to a video that helped me in that regard.
Hope that clarifies.