Revert "Using unmasked images in the BBR stage gives better results."
Revert "Using unmasked images in the BBR stage gives better results."

This reverts commit 1d1c08a0118aef5118a9f9156f9414d09a71609b.

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