removed class

Author: RemDelaporteMathurin

src/festim/species.py

@@ -225,13 +225,3 @@ def find_species_from_name(name: str, species: list):
         if spe.name == name:
             return spe
     raise ValueError(f"Species {name} not found in list of species")
-
-
-class SpeciesChangeVar(Species):
-    @property
-    def concentration(self):
-        return self._concentration
-
-    @concentration.setter
-    def concentration(self, value):
-        self._concentration = value