`data-multi-subject/derivatives/labels` contains more subjects than `data-multi-subject`

[valosekj]

data-multi-subject/derivatives/labels contains more subjects than the root dataset (data-multi-subject):

$ cd data-multi-subject
$ ls -1d sub-* | wc -l
     267

$ cd derivatives/labels
$ ls -1d sub-* | wc -l
     276

Namely, it concerns the following subjects:

# run in derivatives/labels
$ ls -1d sub-* >> ../../derivatives.txt
# go back to the root dataset
$ cd ../..
$ ls -1d sub-* >> root_dataset.txt
$ grep -Fxv -f root_dataset.txt derivatives.txt
sub-brno01
sub-brno02
sub-brno03
sub-brno04
sub-brno05
sub-brno06
sub-brno07
sub-brno08
sub-brnoPrisma04

I think it is a "residue" after brno sites renaming (brno → brnoUH, brnoPrisma → brnoCEITEC). In other words, the above-mentioned subjects are duplicated in derivatives/labels.
I believe we can run git rm on them.

Thanks to @naga-karthik for noticing this!