remove fileGrp cardinality assertions

Author: bertsky

ocrd_kraken/binarize.py

@@ -17,11 +17,6 @@ class KrakenBinarize(Processor):
     def executable(self):
         return 'ocrd-kraken-binarize'
 
-    def setup(self):
-        self.logger = getLogger('processor.KrakenBinarize')
-        assert_file_grp_cardinality(self.input_file_grp, 1)
-        assert_file_grp_cardinality(self.output_file_grp, 1)
-
     def process_page_pcgts(self, *input_pcgts : OcrdPage, output_file_id : Optional[str] = None, page_id : Optional[str] = None) -> OcrdPage:
         """Binarize the pages/regions/lines with Kraken.
 

ocrd_kraken/recognize.py

@@ -54,10 +54,8 @@ def executable(self):
 
     def setup(self):
         """
-        Assert filegrp cardinality, load model, set predict function
+        Load model, set predict function
         """
-        assert_file_grp_cardinality(self.input_file_grp, 1)
-        assert_file_grp_cardinality(self.output_file_grp, 1)
 
         self.logger = getLogger('processor.KrakenRecognize')
         import torch

ocrd_kraken/segment.py

@@ -45,8 +45,6 @@ def setup(self):
         Load models
         """
         self.logger = getLogger('processor.KrakenSegment')
-        assert_file_grp_cardinality(self.input_file_grp, 1)
-        assert_file_grp_cardinality(self.output_file_grp, 1)
         kwargs = {}
         kwargs['text_direction'] = self.parameter['text_direction']
         self.use_legacy = self.parameter['use_legacy']