Remove references to source_url

fedireads/activitypub/book.py

@@ -17,8 +17,6 @@ def get_book(book):
         'physical_format',
         'misc_identifiers',
 
-        'source_url',
-
         'description',
         'languages',
         'series',

fedireads/connectors/fedireads_connector.py

@@ -61,8 +61,8 @@ class Connector(AbstractConnector):
         }
         book = update_from_mappings(book, data, mappings)
 
-        if not book.source_url:
-            book.source_url = response.url
+        if not book.remote_id:
+            book.remote_id = response.url
         if not book.connector:
             book.connector = self.connector
         book.save()

fedireads/forms.py

@@ -109,7 +109,6 @@ class EditionForm(ModelForm):
             'subjects',# TODO
             'subject_places',# TODO
 
-            'source_url',
             'connector',
         ]