remove useless printing

[salma1601]

in afni.preprocess, used to debug I guess

[codecov-io]

Codecov Report

Merging #2275 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #2275      +/-   ##
=========================================
- Coverage    72.5%   72.5%   -0.01%     
=========================================
  Files        1188    1188              
  Lines       59134   59133       -1     
  Branches     8505    8505              
=========================================
- Hits        42877   42875       -2     
- Misses      14871   14872       +1     
  Partials     1386    1386

Flag	Coverage Δ
#smoketests	72.5% <ø> (-0.01%)	⬇️
#unittests	70.12% <ø> (-0.01%)	⬇️

Impacted Files	Coverage Δ
nipype/interfaces/afni/preprocess.py	80.62% <ø> (+0.1%)	⬆️
nipype/utils/profiler.py	40.36% <0%> (-1.21%)	⬇️

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