STY: Further simplification

Co-authored-by: Chris Markiewicz <[email protected]>

Author: DimitriPapadopoulos

nipype/interfaces/diffusion_toolkit/odf.py

@@ -100,7 +100,6 @@ def _create_gradient_matrix(self, bvecs_file, bvals_file):
         _gradient_matrix_file = "gradient_matrix.txt"
         with open(bvals_file) as bvals_f:
             bvals = bvals_f.readline().strip().split()
-        bvecs_f = open(bvecs_file)
         bvecs_x = list(re.split(r"\s+", bvecs_f.readline().strip()))
         bvecs_y = list(re.split(r"\s+", bvecs_f.readline().strip()))
         bvecs_z = list(re.split(r"\s+", bvecs_f.readline().strip()))