suit/transport/coap: Use generic subtree handler

The SUIT CoAP code can make use of the generic subtree handler. This
commit removes the obsolete code to make use of the more generic
nanocoap subtree handlers.

sys/include/suit/transport/coap.h

@@ -67,29 +67,6 @@ void suit_coap_run(void);
  */
 #ifndef DOXYGEN
 
-/**
- * @brief   Coap subtree handler
- *
- * @param[in,out]   pkt     Packet struct containing the request. Is reused for
- *                          the response
- * @param[in]       buf     Buffer to write reply to
- * @param[in]       len     Total length of the buffer associated with the
- *                          request
- * @param[in]       buf     Buffer to write reply to
- *
- * @returns     ssize_t     Size of the reply
- */
-ssize_t coap_subtree_handler(coap_pkt_t *pkt, uint8_t *buf,
-                             size_t len, void *context);
-
-/**
- * @brief   Type for CoAP resource subtrees
- */
-typedef const struct {
-    const coap_resource_t *resources;   /**< ptr to resource array  */
-    const size_t resources_numof;       /**< nr of entries in array */
-} coap_resource_subtree_t;
-
 /**
  * @brief   Reference to the coap resource subtree
  */

sys/suit/transport/coap.c

@@ -104,14 +104,6 @@ static inline void _print_download_progress(suit_manifest_t *manifest,
 
 static kernel_pid_t _suit_coap_pid;
 
-ssize_t coap_subtree_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len,
-                             void *context)
-{
-    coap_resource_subtree_t *subtree = context;
-    return coap_tree_handler(pkt, buf, len, subtree->resources,
-                             subtree->resources_numof);
-}
-
 static void _suit_handle_url(const char *url, coap_blksize_t blksize)
 {
     LOG_INFO("suit_coap: downloading \"%s\"\n", url);