Remove outdated comments

[tashrifbillah]

debug_fa.py

def analyzeStat(file, templatePath):
    '''
    :param file: list of (FA or MD or GFA) that are already in MNI space

It actually accepts a list of dwi.

moving = pjoin(directory, 'dti', prefix + f'_{dm}.nii.gz')
# warp diffusion measure to template space first, then to MNI space

This comment needs to be broken down and put in proper places.