pktbuf: do not inline gnrc_pktbuf_remove_snip

sys/include/net/gnrc/pktbuf.h

@@ -202,15 +202,7 @@ gnrc_pktsnip_t *gnrc_pktbuf_get_iovec(gnrc_pktsnip_t *pkt, size_t *len);
  *
  * @return  The new reference to @p pkt.
  */
-static inline gnrc_pktsnip_t *gnrc_pktbuf_remove_snip(gnrc_pktsnip_t *pkt,
-                                                      gnrc_pktsnip_t *snip)
-{
-    LL_DELETE(pkt, snip);
-    snip->next = NULL;
-    gnrc_pktbuf_release(snip);
-
-    return pkt;
-}
+gnrc_pktsnip_t *gnrc_pktbuf_remove_snip(gnrc_pktsnip_t *pkt, gnrc_pktsnip_t *snip);
 
 #ifdef DEVELHELP
 /**

sys/net/gnrc/pktbuf_static/gnrc_pktbuf_static.c

@@ -493,4 +493,14 @@ static void _pktbuf_free(void *data, size_t size)
     }
 }
 
+
+gnrc_pktsnip_t *gnrc_pktbuf_remove_snip(gnrc_pktsnip_t *pkt, gnrc_pktsnip_t *snip)
+{
+    LL_DELETE(pkt, snip);
+    snip->next = NULL;
+    gnrc_pktbuf_release(snip);
+
+    return pkt;
+}
+
 /** @} */