Remove unused defines.
@@ -322,9 +322,6 @@ static const JanetAbstractType ProcAT;
#define JANET_PROC_WAITED 2
#define JANET_PROC_WAITING 4
#define JANET_PROC_ERROR_NONZERO 8
-#define JANET_PROC_OWNS_STDIN 16
-#define JANET_PROC_OWNS_STDOUT 32
-#define JANET_PROC_OWNS_STDERR 64
typedef struct {
int flags;
#ifdef JANET_WINDOWS
