Remove call to undefined teardown_neutron_debug

Previously the usage of neutron debug ports was removed by
5e01c47e4d671166b9396c507a7105a5ac8256dc but there was still call to
teardown_neutron_debug. Recently a change to devstack-gate
1d6cc0771a3399300117f488e9d71e7ea46a4d82 caused that call to be
triggered and breaking the gate-devstack-dsvm-updown job.

This patch deletes the call and comments regarding setup_neutron_debug
and teardown_neutron_debug.

Change-Id: Ifdacb0cec1307db469bd66f551474539184cf2cd
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 9e926a0..613e0f1 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -24,11 +24,9 @@
 # - check_neutron_third_party_integration
 # - start_neutron_agents
 # - create_neutron_initial_network
-# - setup_neutron_debug
 #
 # ``unstack.sh`` calls the entry points in this order:
 #
-# - teardown_neutron_debug
 # - stop_neutron
 # - stop_neutron_third_party
 # - cleanup_neutron
diff --git a/unstack.sh b/unstack.sh
index f888896..c05d1f0 100755
--- a/unstack.sh
+++ b/unstack.sh
@@ -97,11 +97,6 @@
 # Phase: unstack
 run_phase unstack
 
-if [[ "$Q_USE_DEBUG_COMMAND" == "True" ]]; then
-    source $TOP_DIR/openrc
-    teardown_neutron_debug
-fi
-
 # Call service stop
 
 if is_service_enabled heat; then