Extensions no longer appends the version.

The endpoint *should* have it already. Checking other resources and the acceptance
tests presently.
diff --git a/openstack/networking/v2/extensions/delegate_test.go b/openstack/networking/v2/extensions/delegate_test.go
index 5cc7c12..969ea80 100644
--- a/openstack/networking/v2/extensions/delegate_test.go
+++ b/openstack/networking/v2/extensions/delegate_test.go
@@ -26,7 +26,7 @@
 	th.SetupHTTP()
 	defer th.TeardownHTTP()
 
-	th.Mux.HandleFunc("/v2.0/extensions", func(w http.ResponseWriter, r *http.Request) {
+	th.Mux.HandleFunc("/extensions", func(w http.ResponseWriter, r *http.Request) {
 		th.TestMethod(t, r, "GET")
 		th.TestHeader(t, r, "X-Auth-Token", TokenID)
 
@@ -84,7 +84,7 @@
 	th.SetupHTTP()
 	defer th.TeardownHTTP()
 
-	th.Mux.HandleFunc("/v2.0/extensions/agent", func(w http.ResponseWriter, r *http.Request) {
+	th.Mux.HandleFunc("/extensions/agent", func(w http.ResponseWriter, r *http.Request) {
 		th.TestMethod(t, r, "GET")
 		th.TestHeader(t, r, "X-Auth-Token", TokenID)