ENH: Do not set KEEP_FILE_OPEN_DEFAULT

Keeping the file handle open within indexed_gzip may be producing the issue reported in gh-801. This will have us rely strictly on indexed_gzip's internal file handle management, and keep nibabel out of it.

Author: effigies

fmriprep/cli/run.py

@@ -20,8 +20,6 @@
 from time import strftime
 import nibabel
 
-nibabel.arrayproxy.KEEP_FILE_OPEN_DEFAULT = 'auto'
-
 logging.addLevelName(25, 'IMPORTANT')  # Add a new level between INFO and WARNING
 logging.addLevelName(15, 'VERBOSE')  # Add a new level between INFO and DEBUG
 logger = logging.getLogger('cli')