NSX: remove req_timeout as it's not longer used

This patch removes req_timeout from devstack as it's no longer used.
This was removed from neutron here:
    Id7244cd4d9316931f4f7df1c3b41b3a894f2909a

Change-Id: Ife901479605323e32f24e11266a232fddbd6bdca
diff --git a/lib/neutron_plugins/vmware_nsx b/lib/neutron_plugins/vmware_nsx
index 5802ebf..f4eb82d 100644
--- a/lib/neutron_plugins/vmware_nsx
+++ b/lib/neutron_plugins/vmware_nsx
@@ -105,9 +105,6 @@
     if [[ "$NSX_PASSWORD" != "" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_password $NSX_PASSWORD
     fi
-    if [[ "$NSX_REQ_TIMEOUT" != "" ]]; then
-        iniset /$Q_PLUGIN_CONF_FILE DEFAULT req_timeout $NSX_REQ_TIMEOUT
-    fi
     if [[ "$NSX_HTTP_TIMEOUT" != "" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE DEFAULT http_timeout $NSX_HTTP_TIMEOUT
     fi