Remove deprecated statistics properties of channel

src/gpodder/dbsqlite.py

@@ -73,8 +73,6 @@ class Database(object):
             ('channel_is_locked', 'INTEGER', True, '0'), # 1 if deletion is prevented, 0 otherwise
             ('foldername', 'TEXT', True, "''"), # Folder name (basename) to put downloaded episodes
             ('auto_foldername', 'INTEGER', True, '1'), # 1 if the foldername was auto-generated, 0 otherwise
-            ('release_expected', 'INTEGER', True, '0'), # Statistic value for when a new release is expected
-            ('release_deviation', 'INTEGER', True, '0'), # Deviation of the release cycle differences
             ('updated_timestamp', 'INTEGER', True, '0'), # Timestamp of the last feed update
             ('feed_update_enabled', 'INTEGER', True, '1'), # 0 to skip this feed when checking for new episodes
     )

src/gpodder/model.py

@@ -391,8 +391,6 @@ class PodcastChannel(PodcastModelObject):
 
         self.channel_is_locked = False
 
-        self.release_expected = time.time() # <= DEPRECATED
-        self.release_deviation = 0 # <= DEPRECATED
         self.updated_timestamp = 0
 
         self.feed_update_enabled = True