Why is misaki included in the requirements file?

Is there a reason to import misaki inside this project? misaki needs a fallback bert model that requires torch which is a huge dependency. as long as one is using espeak and phonemizer to create phonemes why would we need a grapheme to phoneme tool like misaki? Also why spacy is included in the requirements file? those two requirements increase the size of the virtualenv required to run the code immensely!