tests/api/api-h264-slice-test: remove unused bool header

Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Josh de Kock <josh@itanimul.li>

tests/api/api-h264-slice-test.c

@@ -24,7 +24,6 @@
 
 #include "config.h"
 
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>