GUACAMOLE-210: Remove unnecessary empty template definitions (empty template is the default).

extensions/guacamole-auth-openid/src/main/resources/openidConfig.js

@@ -25,7 +25,6 @@ angular.module('guacOpenID').config(['formServiceProvider',
 
     // Define field for token from OpenID service
     formServiceProvider.registerFieldType("GUAC_OPENID_TOKEN", {
-        template   : '',
         controller : 'guacOpenIDController',
         module     : 'guacOpenID'
     });