Remove collector from storage

Given that the Gnocchi storage doesn't exist anymore, there is no reason for
the storage to have a reference to the collector.

Change-Id: Ia7dea586445647447d9cd22de3b307015ad6e86d

cloudkitty/orchestrator.py

@@ -231,7 +231,7 @@ class Orchestrator(object):
 
         transformers = transformer.get_transformers()
         self.collector = collector.get_collector(transformers)
-        self.storage = storage.get_storage(collector=self.collector)
+        self.storage = storage.get_storage()
 
         # RPC
         self.server = None

cloudkitty/storage/__init__.py

@@ -22,7 +22,6 @@ from oslo_log import log as logging
 import six
 from stevedore import driver
 
-from cloudkitty import collector as ck_collector
 from cloudkitty import utils as ck_utils
 
 
@@ -37,12 +36,9 @@ METRICS_CONF = ck_utils.get_metrics_conf(CONF.collect.metrics_conf)
 STORAGES_NAMESPACE = 'cloudkitty.storage.backends'
 
 
-def get_storage(collector=None):
-    if not collector:
-        collector = ck_collector.get_collector()
+def get_storage():
     storage_args = {
         'period': METRICS_CONF.get('period', 3600),
-        'collector': collector,
     }
     backend = driver.DriverManager(
         STORAGES_NAMESPACE,