timestamp.patch

diff --git a/timestamp.h b/timestamp.h
index b52277a..361dab8 100644
--- a/timestamp.h
+++ b/timestamp.h
@@ -28,7 +28,6 @@
 #include <stddef.h>
 #include <time.h>
 #include <stdint.h>
-#include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -44,7 +43,6 @@ int         timestamp_parse            (const char *str, size_t len, timestamp_t
 size_t      timestamp_format           (char *dst, size_t len, const timestamp_t *tsp);
 size_t      timestamp_format_precision (char *dst, size_t len, const timestamp_t *tsp, int precision);
 int         timestamp_compare          (const timestamp_t *tsp1, const timestamp_t *tsp2);
-bool        timestamp_valid            (const timestamp_t *tsp);
 struct tm * timestamp_to_tm_utc        (const timestamp_t *tsp, struct tm *tmp);
 struct tm * timestamp_to_tm_local      (const timestamp_t *tsp, struct tm *tmp);