Don't check for TIME_WITH_SYS_TIME

Follow the suggestion made by the autoupdate(1) tool:

| All current systems provide time.h; it need not be checked for.  Not
| all systems provide sys/time.h, but those that do, all allow you to
| include it and time.h simultaneously.

Therefore, include sys/time.h if available, and include time.h
unconditionally.

2 files changed, 3 insertions, 22 deletions

diff --git a/configure.ac b/configure.ac
index e3b66fef..79b44c7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -607,23 +607,10 @@ dnl
 dnl Checks for header files.
 dnl
 
-m4_warn([obsolete],
-[Update your code to rely only on HAVE_SYS_TIME_H,
-then remove this warning and the obsolete code below it.
-All current systems provide time.h; it need not be checked for.
-Not all systems provide sys/time.h, but those that do, all allow
-you to include it and time.h simultaneously.])dnl
-AC_CHECK_HEADERS_ONCE([sys/time.h])
-# Obsolete code to be removed.
-if test $ac_cv_header_sys_time_h = yes; then
-  AC_DEFINE([TIME_WITH_SYS_TIME],[1],[Define to 1 if you can safely include both <sys/time.h>
-             and <time.h>.  This macro is obsolete.])
-fi
-# End of obsolete code.
-
 AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS(signal.h syslog.h uio.h errno.h sys/time.h sys/socket.h sys/un.h sys/poll.h)
 AC_CHECK_HEADERS(features.h stdarg.h sys/unistd.h ctype.h)
+AC_CHECK_HEADERS_ONCE([sys/time.h])
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
diff --git a/plugins/common.h b/plugins/common.h
index 833479ce..b7a7d59b 100644
--- a/plugins/common.h
+++ b/plugins/common.h
@@ -90,16 +90,10 @@
 # define GET_NUMBER_OF_CPUS() -1
 #endif
 
-#ifdef TIME_WITH_SYS_TIME
+#ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
-# include <time.h>
-#else
-# ifdef HAVE_SYS_TIME_H
-#  include <sys/time.h>
-# else
-#  include <time.h>
-# endif
 #endif
+#include <time.h>
 
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>