Question

Can the samples be removed from the skill after labeling and training?

Answer

To train the documented skill with all samples, that were provided to the software, it is crucial to keep all the samples inside the skill, removing just obsolete or irrelevant ones.

In case you train on 10 samples, then remove them and add another 10 to train on them, only the latest would be applied to the skill and previous training would be considered obsolete with the samples removed.