Apply suggestions from code review: Removing unused code

Co-authored-by: Chris Markiewicz <effigies@gmail.com>

Author: JulianKlug

nibabel/cmdline/stats.py

@@ -24,7 +24,7 @@ def _get_parser():
     p.add_argument("-V", "--Volume", action="store_true", required=False,
                    help="Compute mask volume of a given mask image.")
     p.add_argument("--units", default="mm3", required=False,
-                   help="Preferred output units of {mm3, vox}. Defaults to mm3")
+                   choices=("mm3", "vox"), help="Preferred output units")
     return p
 
 def main(args=None):
@@ -36,4 +36,4 @@ def main(args=None):
     if opts.Volume:
         computed_volume = mask_volume(from_img, opts.units)
         print(computed_volume)
-        return computed_volume
+        return 0

nibabel/cmdline/tests/test_stats.py

@@ -8,16 +8,8 @@
 #
 ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
 
-import unittest
-
-import pytest
-
 from nibabel.testing import test_data
 from nibabel.cmdline.stats import main
-from nibabel.optpkg import optional_package
-
-_, have_scipy, _ = optional_package('scipy.ndimage')
-needs_scipy = unittest.skipUnless(have_scipy, 'These tests need scipy')
 
 
 def test_volume():
@@ -30,4 +22,3 @@ def test_volume():
     assert float(vol_mm3) == 2273328656.0
     assert float(vol_vox) == 284166082.0
 
-