namedb: remove dname.h inclusion

src/libknot/internal/namedb/namedb.h

@@ -16,8 +16,6 @@
 
 #pragma once
 
-#include "libknot/dname.h"
-
 #include "libknot/internal/mempattern.h"
 
 enum {

src/libknot/internal/namedb/namedb_lmdb.c

@@ -15,6 +15,8 @@
 */
 
 #include <assert.h>
+#include <stdbool.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <unistd.h>
 

tests/namedb.c

@@ -15,6 +15,8 @@
  */
 
 #include <dirent.h>
+#include <stdbool.h>
+#include <stdio.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>