Moving extensions and API versions into different sub-packages; fixing test helper methods
diff --git a/openstack/networking/v2/networks/urls.go b/openstack/networking/v2/networks/urls.go
index 0b0b70e..13fcc03 100644
--- a/openstack/networking/v2/networks/urls.go
+++ b/openstack/networking/v2/networks/urls.go
@@ -1,25 +1,9 @@
 package networks
 
-import (
-	"strings"
-
-	"github.com/rackspace/gophercloud"
-)
+import "github.com/rackspace/gophercloud"
 
 const Version = "v2.0"
 
-func APIVersionsURL(c *gophercloud.ServiceClient) string {
-	return c.ServiceURL("")
-}
-
-func APIInfoURL(c *gophercloud.ServiceClient, version string) string {
-	return c.ServiceURL(strings.TrimRight(version, "/") + "/")
-}
-
-func ExtensionURL(c *gophercloud.ServiceClient, name string) string {
-	return c.ServiceURL(Version, "extensions", name)
-}
-
 func NetworkURL(c *gophercloud.ServiceClient, id string) string {
 	return c.ServiceURL(Version, "networks", id)
 }