Remove unnecessary function call
Remove unnecessary function call

This should speed up the migrator a little bit because it cuts out a function
call that happens once per field per record per model.

maurizi/otm-core,recklessromeo/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,clever-crow-consulting/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,maurizi/otm-core,RickMohr/otm-core,maurizi/otm-core,RickMohr/otm-core,maurizi/otm-core