remove fmri_preprocess_multiple for the time being
remove fmri_preprocess_multiple for the time being

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