Remove use of AC_HEADER_TIME, only obsolete platforms actually

need this.  Also stop removing sys/time.h unless the source file
uses struct timeval.

lib/util/utimens.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 Todd C. Miller <Todd.Miller@sudo.ws>
+ * Copyright (c) 2015, 2018 Todd C. Miller <Todd.Miller@sudo.ws>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -23,9 +23,7 @@
 #include <sys/time.h>
 #include <stdio.h>
 #include <errno.h>
-#ifdef TIME_WITH_SYS_TIME
-# include <time.h>
-#endif
+#include <time.h>
 #if !defined(HAVE_UTIMES) || defined(HAVE_FUTIME)
 # include <utime.h>
 #endif