Based on what you are doing in the code you posted, I would think about using two arrays. One to hold all the original values, and one to hold what you want displayed in the combobox. Once you have received the value to be deleted, simply generate the second array by parsing through the IDs of the first array and add them to the second unless the ID matches the one selected in the first combobox.
There are plenty of other options, but I based this on what you show your are attempting to do in your posted code. I have a notion that there is a module somewhere on CPAN which will make this easier for you, but without knowing more about what and how you are doing things, it is a bit hard to suggest options.
...the majority is always wrong, and always the last to know about it...
A solution is nothing more than a clearly stated problem...
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