out_file: use flb_metrics.h header
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_time.h>
+#include <fluent-bit/flb_metrics.h>
#include <msgpack.h>
-#include <cmetrics/cmetrics.h>
-#include <cmetrics/cmt_encode_text.h>
-#include <cmetrics/cmt_decode_msgpack.h>
-
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
