Fix pylint warnings / errors in harvest_tools.

modules/harvest_tools/automaton.py

@@ -11,8 +11,7 @@ from gluon.storage import Storage
 from invenio_tools import (CheckAndFix,
                            InvenioStore,
                            Marc12,
-                           OAI_URL,
-                           REG_OAI)
+                           OAI_URL)
 from msg import Msg
 from msgcollection import MsgCollection
 from plugin_dbui import CALLBACK_ERRORS, get_create_id, get_id, UNDEF_ID

modules/harvest_tools/base.py

@@ -2,9 +2,6 @@
 """ harvest_tools.base
 
 """
-import re
-
-from gluon import current
 from invenio_tools import REG_AUTHOR
 
 DRY_RUN = "dry run"

modules/harvest_tools/notes.py

@@ -61,8 +61,6 @@ class Notes(Automaton):
         zero otherwise.
 
         """
-        db = self.db
-
         # alias
         first_author = record.first_author()
         oai_url = record.oai_url()