sfs/share: Delete share (#120)

diff --git a/openstack/sharedfilesystems/v2/shares/requests.go b/openstack/sharedfilesystems/v2/shares/requests.go
index f168178..292ea95 100644
--- a/openstack/sharedfilesystems/v2/shares/requests.go
+++ b/openstack/sharedfilesystems/v2/shares/requests.go
@@ -67,3 +67,9 @@
 	})
 	return
 }
+
+// Delete will delete an existing Share with the given UUID.
+func Delete(client *gophercloud.ServiceClient, id string) (r DeleteResult) {
+	_, r.Err = client.Delete(deleteURL(client, id), nil)
+	return
+}