Remove ObjectId from the tree

This was one of the last remaining Mongo holdouts and has been removed from
the tree herewith. Good bye, ObjectId.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

mediagoblin/db/sql/fake.py

@@ -21,17 +21,8 @@ calm the rest of the code base. Or provide super minimal
 implementations.
 
 Currently:
-- ObjectId "class": It's a function mostly doing
-  int(init_arg) to convert string primary keys into
-  integer primary keys.
 - DESCENDING "constant"
 """
 
 
 DESCENDING = object()  # a unique object for this "constant"
-
-
-def ObjectId(value=None):
-    if value is None:
-        return None
-    return int(value)

mediagoblin/db/util.py

@@ -15,6 +15,6 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #TODO: check now after mongo removal if we can't rip out a layer of abstraction
-from mediagoblin.db.sql.fake import ObjectId, DESCENDING
+from mediagoblin.db.sql.fake import DESCENDING
 from mediagoblin.db.sql.util import atomic_update, check_media_slug_used, \
     media_entries_for_tag_slug, check_collection_slug_used