Address review comments. (Will be squashed before merge)

bin.src/makeGen3DcrSubfilters.py

@@ -30,8 +30,6 @@
 # Build a parser for command line arguments
 parser = argparse.ArgumentParser(description="Define the set of subfilters for chromatic modeling.")
 parser.add_argument("butler", metavar="Butler", type=str, help="Path to a gen3 butler")
-parser.add_argument("collection", type=str, metavar="Collection",
-                    help="Name of the Butler collection the subfilters should be inserted into.")
 parser.add_argument("-C", "--config-file", dest="configFile",
                     help="Path to a config file overrides file")
 

python/lsst/pipe/tasks/makeGen3DcrSubfilters.py

@@ -33,10 +33,10 @@ class MakeGen3DcrSubfiltersConfig(pexConfig.Config):
         default=3,
         optional=False
     )
-    filterName = pexConfig.Field(
-        doc="The filter to add chromatic subfilters to in the registry.",
+    filterName = pexConfig.ListField(
+        doc="The filters to add chromatic subfilters to in the registry.",
         dtype=str,
-        default="g",
+        default=["g"],
         optional=False
     )
 
@@ -54,9 +54,6 @@ class MakeGen3DcrSubfiltersTask(pipeBase.Task):
         config is created if value is None
     """
 
-    def __init__(self, *, config=None, **kwargs):
-        super().__init__(config=config, **kwargs)
-
     def run(self, butler):
         """Construct a set of subfilters for chromatic modeling.
         Parameters