--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -2897,34 +2897,16 @@ elif test "$GNU_CC"; then
         MOZ_C_SUPPORTS_WARNING(-W, no-error=coverage-mismatch, ac_c_has_noerror_coverage_mismatch)
         MOZ_CXX_SUPPORTS_WARNING(-W, no-error=coverage-mismatch, ac_cxx_has_noerror_coverage_mismatch)
         MOZ_C_SUPPORTS_WARNING(-W, no-error=free-nonheap-object, ac_c_has_noerror_free_nonheap_object)
         MOZ_CXX_SUPPORTS_WARNING(-W, no-error=free-nonheap-object, ac_cxx_has_noerror_free_nonheap_object)
     fi
 fi
 
 dnl ========================================================
-dnl = Enable DMD
-dnl ========================================================
-
-MOZ_ARG_ENABLE_BOOL(dmd,
-[  --enable-dmd            Enable DMD; also enables jemalloc and replace-malloc],
-    MOZ_DMD=1,
-    MOZ_DMD= )
-
-if test "$MOZ_DMD"; then
-    AC_DEFINE(MOZ_DMD)
-
-    if test "${CPU_ARCH}" = "arm"; then
-        CFLAGS="$CFLAGS -funwind-tables"
-        CXXFLAGS="$CXXFLAGS -funwind-tables"
-    fi
-fi
-
-dnl ========================================================
 dnl = Enable jemalloc
 dnl ========================================================
 
 LOCAL_MOZ_MEMORY=1
 MOZ_ARG_DISABLE_BOOL(jemalloc,
 [  --disable-jemalloc       Don't replace memory allocator with jemalloc],
     LOCAL_MOZ_MEMORY=)