diff --git a/src/utils_vl_lookup.h b/src/utils_vl_lookup.h
--- a/src/utils_vl_lookup.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/**
- * collectd - src/utils_vl_lookup.h
- * Copyright (C) 2012 Florian Forster
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Florian Forster <octo at collectd.org>
- **/
-
-#ifndef UTILS_VL_LOOKUP_H
-#define UTILS_VL_LOOKUP_H 1
-
-#include "plugin.h"
-
-/*
- * Types
- */
-struct lookup_s;
-typedef struct lookup_s lookup_t;
-
-/* Given a user_class, constructs a new user_obj. */
-typedef void *(*lookup_class_callback_t) (data_set_t const *ds,
- value_list_t const *vl, void *user_class);
-
-/* Given a user_class and a ds/vl combination, does stuff with the data.
- * This is the main working horse of the module. */
-typedef int (*lookup_obj_callback_t) (data_set_t const *ds,
- value_list_t const *vl,
- void *user_class, void *user_obj);
-
-/* Used to free user_class pointers. May be NULL in which case nothing is
- * freed. */
-typedef void (*lookup_free_class_callback_t) (void *user_class);
-
-/* Used to free user_obj pointers. May be NULL in which case nothing is
- * freed. */
-typedef void (*lookup_free_obj_callback_t) (void *user_obj);
-
-struct identifier_s
-{
- char host[DATA_MAX_NAME_LEN];
- char plugin[DATA_MAX_NAME_LEN];
- char plugin_instance[DATA_MAX_NAME_LEN];
- char type[DATA_MAX_NAME_LEN];
- char type_instance[DATA_MAX_NAME_LEN];
-};
-typedef struct identifier_s identifier_t;
-
-#define LU_GROUP_BY_HOST 0x01
-#define LU_GROUP_BY_PLUGIN 0x02
-#define LU_GROUP_BY_PLUGIN_INSTANCE 0x04
-/* #define LU_GROUP_BY_TYPE 0x00 */
-#define LU_GROUP_BY_TYPE_INSTANCE 0x10
-
-/*
- * Functions
- */
-__attribute__((nonnull(1,2)))
-lookup_t *lookup_create (lookup_class_callback_t,
- lookup_obj_callback_t,
- lookup_free_class_callback_t,
- lookup_free_obj_callback_t);
-void lookup_destroy (lookup_t *obj);
-
-int lookup_add (lookup_t *obj,
- identifier_t const *ident, unsigned int group_by, void *user_class);
-
-/* TODO(octo): Pass lookup_obj_callback_t to lookup_search()? */
-int lookup_search (lookup_t *obj,
- data_set_t const *ds, value_list_t const *vl);
-
-#endif /* UTILS_VL_LOOKUP_H */