Update Modelling/Nisin Production/protein_production_version_2_1_co_culture .py, Modelling/PHB Model/Dixon_2011_PHB_Predictive_Model - iGEM Calgary 2022_Working Copy.sbproj

Update Modelling/Nisin Production/protein_production_version_2 _e.coli_monoculture.py, Modelling/Nisin Production/protein_production_version_2_1_co_culture .py, Modelling/Co-culture and Protein Model/co_culture_model_version_4_1_bc_production_dependent_on_glucose.py, Modelling/Co-culture and Protein Model/co_culture_model_version_4_bc_production.py, Modelling/Co-culture and Protein Model/monoculture_model_version_1_1_bc_production_dependent_on_glucose.py
Deleted Modelling/Co-culture and Protein Model/.gitkeep