remove Electric Fence support?

The autotools build system contains support for building with eFence:

dnl -----------------------------------
dnl ElectricFence support for debugging

AC_ARG_WITH(efence,
   [AS_HELP_STRING([--with-efence=no],[use efence for debugging memory use])],
   [],[with_efence=no])
if test "x$with_efence" = "xyes"; then
        LIBS="$LIBS -lefence"
fi

Does anyone use this? I am under the impression eFence's functionality had been entirely subsumed by Valgrind and later Address Sanitizer. The only scenario in which I have found eFence preferable is free-standing environments (e.g. OS kernels) where there are fewer instrumentation options. I can't imagine anyone is running Graphviz in a free-standing environment though.