def remove_for_group(group, since):
"""
Returns all items to remove past a specific date in utc.
:Parameters:
- `since`: a specific date in utc
- `group`: group to limit items to
"""
try:
timestamp = datetime.datetime.strptime(since, "%Y-%m-%dT%H:%M:%S")
items = Removal.objects(date__gt=timestamp, group=group)
return stream_items(items)
except:
return error()
