STY: Remove unused import [skip ci]

effigies · effigies · commit 64f996169377 · 2019-12-11T17:58:28.000-05:00
diff --git a/nibabel/arrayproxy.py b/nibabel/arrayproxy.py
@@ -27,7 +27,6 @@
 """
 from contextlib import contextmanager
 from threading import RLock
-import warnings
 
 import numpy as np
 
