Fix style-warnings for static-pages plugin.

plugins/static-pages.lisp

@@ -25,6 +25,7 @@
 
 (defmethod render ((object page) &key next prev)
   ;; For the time being, we'll re-use the normal post theme.
+  (declare (ignore next prev))
   (funcall (theme-fn 'post) (list :config *config*
                                   :post object)))