Training on custom dataset

[Janzeero-PhD]

Hello, sorry for the probably stupid question. I have seen an instruction in this repo. Ok, in lable_dict.py I see different class names. If I have my own dataset with 1 class, should I remove all this data to leave only my custom class?
What dataset = 'pascal' means in this case? Style of annotations? Should I change these notes if I use own custom dataset but labelled in Pascal VOC style?
The same questions for changing cfgs.py and other.