Remove Neutron VMware NSX plugin files completely

override-defaults mechanism allows us to define
s_neutron_plugin_security_group before loading lib/neutron,
and we no longer need to have a plugin-specific file in
the master DevStack repository.

Change-Id: Ib0f6e3d9463357d2dd66a2d61b8c722fa1f0bfba
Depends-On: I8b19b8f1b0694a96132f158146848aee7d14e8ff

lib/neutron_plugins/vmware_dvs

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-# This file is needed so Q_PLUGIN=vmware_dvs will work.
-
-# FIXME(salv-orlando): This function should not be here, but unfortunately
-# devstack calls it before the external plugins are fetched
-function has_neutron_plugin_security_group {
-    # 0 means True here
-    return 0
-}

lib/neutron_plugins/vmware_nsx

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-# This file is needed so Q_PLUGIN=vmware_nsx will work.
-
-# FIXME(salv-orlando): This function should not be here, but unfortunately
-# devstack calls it before the external plugins are fetched
-function has_neutron_plugin_security_group {
-    # 0 means True here
-    return 0
-}

lib/neutron_plugins/vmware_nsx_v

@@ -1,10 +0,0 @@
-#!/bin/bash
-#
-# This file is needed so Q_PLUGIN=vmware_nsx_v will work.
-
-# FIXME(salv-orlando): This function should not be here, but unfortunately
-# devstack calls it before the external plugins are fetched
-function has_neutron_plugin_security_group {
-    # 0 means True here
-    return 0
-}

lib/neutron_plugins/vmware_nsx_v3

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-# This file is needed so Q_PLUGIN=vmware_nsx_v3 will work.
-
-# FIXME(salv-orlando): This function should not be here, but unfortunately
-# devstack calls it before the external plugins are fetched
-function has_neutron_plugin_security_group {
-    # 0 means True here
-    return 0
-}