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diff --git a/m4/ac_cxx_have_numeric_limits.m4 b/m4/ac_cxx_have_numeric_limits.m4
deleted file mode 100644
index 617857a..0000000
--- a/m4/ac_cxx_have_numeric_limits.m4
+++ /dev/null
@@ -1,24 +0,0 @@
-dnl @synopsis AC_CXX_HAVE_NUMERIC_LIMITS
-dnl
-dnl If the compiler has numeric_limits<T>, define HAVE_NUMERIC_LIMITS.
-dnl
-dnl @version $Id: ac_cxx_have_numeric_limits.m4,v 1.1 2005/01/07 02:52:49 norwin Exp $
-dnl @author Todd Veldhuizen and Luc Maisonobe <luc@spaceroots.org>
-dnl
-AC_DEFUN([AC_CXX_HAVE_NUMERIC_LIMITS],
-[AC_CACHE_CHECK(whether the compiler has numeric_limits<T>,
-ac_cv_cxx_have_numeric_limits,
-[AC_REQUIRE([AC_CXX_NAMESPACES])
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_TRY_COMPILE([#include <limits>
-#ifdef HAVE_NAMESPACES
-using namespace std;
-#endif],[double e = numeric_limits<double>::epsilon(); return 0;],
- ac_cv_cxx_have_numeric_limits=yes, ac_cv_cxx_have_numeric_limits=no)
- AC_LANG_RESTORE
-])
-if test "$ac_cv_cxx_have_numeric_limits" = yes; then
-  AC_DEFINE(HAVE_NUMERIC_LIMITS,,[define if the compiler has numeric_limits<T>])
-fi
-])