libyang CHANGE review header includes

The plugins_types.h was supposed only for implementing data type plugins
code, so I've removed it from libyang.h (now it is supposed to be
included explicitly).
diff --git a/src/tree_data.c b/src/tree_data.c
index 7b3ae21..8e348f6 100644
--- a/src/tree_data.c
+++ b/src/tree_data.c
@@ -18,14 +18,12 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
+#include <inttypes.h>
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "common.h"
 #include "compat.h"
@@ -33,6 +31,7 @@
 #include "dict.h"
 #include "diff.h"
 #include "hash_table.h"
+#include "in.h"
 #include "in_internal.h"
 #include "log.h"
 #include "parser_data.h"