Partially revert 3f82b20

These columns are actually still returned by CAVE and should be dropped
before showing the dataframe to the user. My previous commit that
stopped dropping these columns was due to me misinterpreting an error
message, I think.

slackbots/neuron_information_bot.py

@@ -119,7 +119,8 @@ def process_message(message: str, user: str, fake=False) -> str:
             return "No annotations found."
         if return_as == 'dataframe':
             info.drop(columns=['id', 'valid', 'pt_supervoxel_id',
-                               'pt_root_id', 'pt_position'], inplace=True)
+                               'pt_root_id', 'pt_position', 'deleted',
+                               'superceded_id'], inplace=True)
             info.rename(columns={'tag': 'annotation',
                                  'tag2': 'annotation_class'}, inplace=True)
             info['created'] = info.created.apply(lambda x: x.date())