Remove Mongoism query.skip()

sqlalchemy supports slice() or [n:m] just fine.

Right now, it seems we cannot distinguish beween "empty" results
and out-of bound slices. It would be nice if we could distinguish
these somehow.

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

mediagoblin/db/sql/base.py

@@ -35,9 +35,6 @@ class GMGQuery(Query):
             key_col = desc(key_col)
         return self.order_by(key_col)
 
-    def skip(self, amount):
-        return self.offset(amount)
-
 
 Session = scoped_session(sessionmaker(query_cls=GMGQuery))