Remove watcher_goals section from devstack plugin

In this changeset, I removed the now useless [watcher_goals] section
from the devstack plugin.

Partially Implements: blueprint get-goal-from-strategy

Change-Id: Iaa986f426dc47f6cbd04e74f16b67670e3563967

devstack/local.conf.controller

@@ -42,7 +42,3 @@ LOGDAYS=2
 [[post-config|$NOVA_CONF]]
 [DEFAULT]
 compute_monitors=cpu.virt_driver
-
-[[post-config|$WATCHER_CONF]]
-[watcher_goals]
-goals=BASIC_CONSOLIDATION:basic,DUMMY:dummy