Make `noop()` static

This makes instanciating the Translate/Template-class unnecessary.

lib/SimpleSAML/Locale/Translate.php

@@ -228,7 +228,7 @@ class Translate
      *
      * @return string The tag, unchanged.
      */
-    public function noop($tag)
+    static public function noop($tag)
     {
         return $tag;
     }

lib/SimpleSAML/XHTML/Template.php

@@ -567,14 +567,14 @@ class SimpleSAML_XHTML_Template
 
 
     /**
-     * Wrap Language->noop to mark a tag for translation but actually do it later.
+     * Behave like Language->noop to mark a tag for translation but actually do it later.
      *
      * @see \SimpleSAML\Locale\Translate::noop()
-     * @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Translate::t() instead.
+     * @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Translate::noop() instead.
      */
-    public function noop($tag)
+    static public function noop($tag)
     {
-        return $this->translator->noop($tag);
+        return $tag;
     }