Remove from petals?

[chahank]

Some of the modules in petals are quite outdated and do not necessarily fullfill the high quality expectation of the current CLIMADA code.

• Drought hazard: https://github.com/CLIMADA-project/climada_petals/blob/main/climada_petals/hazard/drought.py . This module is a wrapper around SPEI indices.
• Drought impact function: https://github.com/CLIMADA-project/climada_petals/blob/main/climada_petals/entity/impact_funcs/drought.py . This module provides an impact function for the drought hazard. It is however not documented.
• LowFlow: https://github.com/CLIMADA-project/climada_petals/blob/main/climada_petals/hazard/low_flow.py . This module is a wrapper around ISIMIP hydro data.
• Emulator: https://github.com/CLIMADA-project/climada_petals/tree/main/climada_petals/hazard/emulator . This module is an emulator for tropical cyclone events which resamples a probablistic set by shifting the quantiles to a new climate. This module is quite mature and well published though, so we might want to keep it for legacy uses.

[peanutfun]

When/If we fix linter issues, make sure we skip/ignore issues in those modules. Add this to the pyproject.toml