Remove slugs from shelf as their id has text in it already

bookwyrm/models/shelf.py

@@ -59,6 +59,10 @@ class Shelf(OrderedCollectionMixin, BookWyrmModel):
         """can the shelf be safely deleted?"""
         return self.editable and not self.shelfbook_set.exists()
 
+    def get_remote_id(self):
+        """do not use slugs"""
+        return self.get_permalink()
+
     def get_permalink(self):
         """shelf identifier instead of id"""
         base_path = self.user.remote_id