Revert "NetApp: Deprecate E-Series drivers"

Upon gathering deployer and operator feedback in the spirit
of OpenStack deprecations, we believe this driver cannot be
deprecated at the moment. Since the CI was never brought down,
I'd like to un-deprecate this driver.

This reverts commit a27f31754fdc4aafe478911571a9d4a62464c1db and
removes the deprecation warning and release note.

Change-Id: I61e666313285187c72010f5dded585fa990f844e

cinder/volume/drivers/netapp/eseries/library.py

@@ -152,12 +152,6 @@ class NetAppESeriesLibrary(object):
         if self.configuration.netapp_enable_multiattach:
             self._ensure_multi_attach_host_group_exists()
 
-        # This driver has been marked 'deprecated' in the Pike release and
-        # can be removed in Queens.
-        msg = _("The NetApp E-Series driver is deprecated and will be "
-                "removed in a future release.")
-        versionutils.report_deprecated_feature(LOG, msg)
-
     def _create_rest_client(self, configuration):
         port = configuration.netapp_server_port
         scheme = configuration.netapp_transport_type.lower()

releasenotes/notes/netapp-deprecate-eseries-drivers-f0787de87ba4f3f7.yaml

@@ -1,6 +0,0 @@
----
-deprecations:
-  - The NetApp E-Series drivers are deprecated as of the Pike release and
-    will be removed in the Queens release. Other configurations of the
-    NetApp driver, i.e Clustered Data ONTAP and Solidfire, are
-    unaffected.