STY: remove unused import

Author: mgxd

nibabel/cifti2/tests/test_new_cifti2.py

@@ -12,7 +12,7 @@
 from nibabel import cifti2 as ci
 from nibabel.tmpdirs import InTemporaryDirectory
 
-from nose.tools import assert_true, assert_equal, assert_raises
+from nose.tools import assert_true, assert_equal
 
 affine = [[-1.5, 0, 0, 90],
           [0, 1.5, 0, -85],