Remove obsolete comments.

They describe some kinetics comments that were moved in 
921d425
and removed in 
22e6a13

Author: rwest

rmgpy/rmg/model.py

@@ -1760,9 +1760,6 @@ def add_reaction_library_to_edge(self, reaction_library):
             self.add_species_to_edge(spec)
 
         for rxn in self.new_reaction_list:
-            # Note that we haven't actually evaluated any fluxes at this point
-            # Instead, we remove the comment below if the reaction is moved to
-            # the core later in the mechanism generation
             if not (self.pressure_dependence and rxn.elementary_high_p and rxn.is_unimolecular()
                     and isinstance(rxn, LibraryReaction) and isinstance(rxn.kinetics, Arrhenius) and \
                     (self.pressure_dependence.maximum_atoms is None or self.pressure_dependence.maximum_atoms >= \