[docker] Remove redundant import of impala conf
@@ -32,7 +32,6 @@ from hadoop.fs.hadoopfs import Hdfs
from notebook.connectors.base import get_interpreter
from notebook.models import make_notebook
from useradmin.models import User
-from impala.conf import USER_SCRATCH_DIR_PERMISSION
from desktop.lib import django_mako
from desktop.lib.exceptions_renderable import PopupException
