model.is_valid logs sbml errors twice

[FFroehlich]

libpetab-python/petab/sbml.py

Line 27 in 286494a

def is_sbml_consistent(sbml_document: libsbml.SBMLDocument,

calls log_sbml_errors

libpetab-python/petab/models/sbml_model.py

Line 111 in 286494a

def is_valid(self) -> bool:

calls log_sbml_errors and is_sbml_consistent