configure.ac: Remove check for GMTOFF

this was from NITB days and now in osmo-msc.git

Change-Id: I337201ec2c2457100b229b5df2cbabbcb801236f

configure.ac

@@ -101,31 +101,6 @@ if test "$enable_coverage" = "yes"; then
    AC_SUBST([COVERAGE_LDFLAGS])
 fi
 
-AC_DEFUN([CHECK_TM_INCLUDES_TM_GMTOFF], [
-  AC_CACHE_CHECK(
-    [whether struct tm has tm_gmtoff member],
-    osmo_cv_tm_includes_tm_gmtoff,
-    [AC_LINK_IFELSE([
-      AC_LANG_PROGRAM([
-        #include <time.h>
-      ], [
-        time_t t = time(NULL);
-        struct tm* lt = localtime(&t);
-        int off = lt->tm_gmtoff;
-      ])
-    ],
-    osmo_cv_tm_includes_tm_gmtoff=yes,
-    osmo_cv_tm_includes_tm_gmtoff=no
-    )]
-  )
-  if test "x$osmo_cv_tm_includes_tm_gmtoff" = xyes; then
-    AC_DEFINE(HAVE_TM_GMTOFF_IN_TM, 1,
-              [Define if struct tm has tm_gmtoff member.])
-  fi
-])
-
-CHECK_TM_INCLUDES_TM_GMTOFF
-
 AC_ARG_ENABLE([vty_tests],
 		AC_HELP_STRING([--enable-vty-tests],
 				[Include the VTY/CTRL tests in make check (deprecated)