RF: delete fmristat.delay code
RF: delete fmristat.delay code

It's completely commented and makes the reader worry about parts of the
code that are in fact solid so remove for now and come back to it.

alexis-roche/nireg,alexis-roche/register,alexis-roche/nipy,alexis-roche/register,alexis-roche/nipy,arokem/nipy,nipy/nireg,arokem/nipy,alexis-roche/nipy,alexis-roche/niseg,alexis-roche/register,alexis-roche/nireg,alexis-roche/niseg,alexis-roche/nipy,arokem/nipy,arokem/nipy,nipy/nireg