Remove unneeded files

src/sakia/app.py

src/sakia/data/entities/identity.py

src/sakia/main.py

src/sakia/money/__init__.py

src/sakia/money/base_referential.py

src/sakia/money/dividend_per_day.py

src/sakia/money/relative.py

src/sakia/money/relative_to_past.py

src/sakia/money/udd_to_past.py