RF: Remove BBR cost function machinery
RF: Remove BBR cost function machinery

poldracklab/preprocessing-workflow,oesteban/fmriprep,oesteban/preprocessing-workflow,oesteban/fmriprep,oesteban/fmriprep,oesteban/preprocessing-workflow,poldracklab/fmriprep,poldracklab/preprocessing-workflow,poldracklab/fmriprep,poldracklab/fmriprep