Delete function named poll_until which never used.

Change-Id: I60a314876f26a403894e3782301348d209e35b0b

zun/common/utils.py

@@ -19,13 +19,11 @@
 import eventlet
 import functools
 import mimetypes
-import time
 
 from oslo_concurrency import lockutils
 from oslo_concurrency import processutils
 from oslo_context import context as common_context
 from oslo_log import log as logging
-from oslo_service import loopingcall
 from oslo_utils import strutils
 import pecan
 import six
@@ -216,37 +214,6 @@ def check_container_id(function):
     return decorated_function
 
 
-def poll_until(retriever, condition=lambda value: value,
-               sleep_time=1, time_out=None, success_msg=None,
-               timeout_msg=None):
-    """Retrieves object until it passes condition, then returns it.
-
-    If time_out_limit is passed in, PollTimeOut will be raised once that
-    amount of time is elapsed.
-    """
-    start_time = time.time()
-
-    def poll_and_check():
-        obj = retriever()
-        if condition(obj):
-            raise loopingcall.LoopingCallDone(retvalue=obj)
-        if time_out is not None and time.time() - start_time > time_out:
-            raise exception.PollTimeOut
-
-    try:
-        poller = loopingcall.FixedIntervalLoopingCall(
-            f=poll_and_check).start(sleep_time, initial_delay=False)
-        poller.wait()
-        LOG.info(success_msg)
-    except exception.PollTimeOut:
-        LOG.error(timeout_msg)
-        raise
-    except Exception as e:
-        LOG.exception("Unexpected exception occurred: %s",
-                      six.text_type(e))
-        raise
-
-
 def get_image_pull_policy(image_pull_policy, image_tag):
     if not image_pull_policy:
         if image_tag == 'latest':