Merge pull request #17 from ai-forever/dev

imagename_column overwrite fix

Author: ShoytovMA

DPF/processors/text2image/t2i_processor.py

@@ -288,6 +288,8 @@ def to_shards(
     ) -> None:
         if columns_to_save is None:
             columns_to_save = []
+        elif self.imagename_column in columns_to_save:
+            columns_to_save.remove(self.imagename_column)
         dataloader = UniversalT2IDataloader(
             self.filesystem,
             self.df,