Useless line of code in shell.py

Shell.py contains lines to import osprofiler. This is useless
because osprofiler options support code was moved to osc-lib.

Removed it.

Change-Id: Ibec17700c87df908640848c3787d190ca66a7bcf
Closes-Bug: #1707103

Author: rayx

openstackclient/shell.py

@@ -21,16 +21,13 @@
 
 from osc_lib.api import auth
 from osc_lib import shell
-from oslo_utils import importutils
 import six
 
 import openstackclient
 from openstackclient.common import client_config as cloud_config
 from openstackclient.common import clientmanager
 from openstackclient.common import commandmanager
 
-osprofiler_profiler = importutils.try_import("osprofiler.profiler")
-
 
 DEFAULT_DOMAIN = 'default'