Answer: As long as they were already dead, I wouldn't worry too much about it as long as the plant seems to be relatively healthy. However, there is a possibility that there is some sort of infestation within the soil, feeding on either decaying organic matter in the soil or possibly feeding on the plant roots. When it comes time to repot, examine the roots and soil carefully for any signs of ongoing infestation. If you find anything, you might want to check with your county extension for a more precise identification of the pest and susggested controls, or ask again at the Q&A with a more detailed description of the pest.
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