Revert "Always set ALLOWED_HOSTS for horizon"

This reverts commit 37f48f3c208de1031ef4589d15194c4079ad4a97.

Change-Id: I8c853c35c5b0b61925c27b461ad625266381f73b
diff --git a/lib/horizon b/lib/horizon
index 5089650..78cbe8b 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -97,11 +97,6 @@
     _horizon_config_set $local_settings "" OPENSTACK_API_VERSIONS {\"identity\":3}
     _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_URI}/v3\""
 
-    # note(trebskit): if HOST_IP points at non-localhost ip address, horizon cannot be accessed
-    # from outside the virtual machine. This fixes is meant primarily for local development
-    # purpose
-    _horizon_config_set $local_settings "" ALLOWED_HOSTS [\"$HOST_IP\"]
-
     if [ -f $SSL_BUNDLE_FILE ]; then
         _horizon_config_set $local_settings "" OPENSTACK_SSL_CACERT \"${SSL_BUNDLE_FILE}\"
     fi