Remove Dropdown Space

Hello,

Previously,
I got a solution from here:
https://www.experts-exchange.com/questions/28002175/Choices-For-DropDown.html


I want to dynamically show only the applicable months as choices and no spaces in the month dropdown option. How do I change the offset function in DV to do that?
For example : if I select Quarter = Q2 and month  = M6, I am seeing this:
W23,W24,W25,W26 and a space in the dropdown.
How do I eliminate that extra space?

See attached image…
spaceINDropDown.png