To my knowledge, we never used this option for papers. Also conceptually, it doesn't make too much sense to use a precomputed merge strategy for a subset of factors. Removing the option simplifies the code and the future integration of a new option required for using the "maximum factor"/"maximum SCP" scoring functions from the ICAPS 2024 paper (https://ai.dmi.unibas.ch/papers/sievers-et-al-icaps2024.pdf) with the SCC merge strategy.