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.

plugins/sudoers/group_plugin.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2015 Todd C. Miller <Todd.Miller@sudo.ws>
+ * Copyright (c) 2010-2018 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
@@ -18,7 +18,6 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/time.h>
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef HAVE_STRING_H
@@ -28,9 +27,7 @@
 # include <strings.h>
 #endif /* HAVE_STRINGS_H */
 #include <unistd.h>
-#ifdef TIME_WITH_SYS_TIME
-# include <time.h>
-#endif
+#include <time.h>
 #include <ctype.h>
 #include <errno.h>
 #include <pwd.h>