Removed obsolete comment line

Author: pp-mo

lib/iris/tests/unit/fileformats/nc_load_rules/actions/__init__.py

@@ -62,7 +62,6 @@ class Mixin__nc_load_actions:
     # "global" test setting : whether to output various debug info
     debug = False
 
-    # whether to perform action in both ways and compare results.
     @classmethod
     def setUpClass(cls):
         # # Control which testing method we are applying.