PY3: Remove PY2 str hack

Author: effigies

nipype/algorithms/modelgen.py

@@ -169,7 +169,7 @@ def bids_gen_info(bids_event_files,
     info = []
     for bids_event_file in bids_event_files:
         with open(bids_event_file) as f:
-            f_events = csv.DictReader(f, skipinitialspace=True, delimiter=str_basetype('\t'))
+            f_events = csv.DictReader(f, skipinitialspace=True, delimiter='\t')
             events = [{k: v for k, v in row.items()} for row in f_events]
         if not condition_column:
             condition_column = '_trial_type'