IMO, pineapple is perfectly acceptable to have on a cut. What is more important than the type of carb is the glycemic index when cutting is concerned. The GI of pineapple is 66. Most starches (grains and tubers) are going to be almost as high or higher than that. Also, grains have little nutrients compared to fruit.
Most of the time, it might be better to choose lower GI fruits such as oranges, grapefruits, and apples, but early in the day or post work-out, pineapple is fine.
The bottom line is your results. If you get the results you want, who cares what you ate to get there. The last cut I did, most of my carbs came from fruit, and I got great results.