Revert of Introduce mkgrokdump to update tools/v8heapconst.py.

test/mkgrokdump/BUILD.gn

Index: test/mkgrokdump/BUILD.gn
diff --git a/test/mkgrokdump/BUILD.gn b/test/mkgrokdump/BUILD.gn
deleted file mode 100644
index 2b0f7fa6a8697ddfaf17bfe70ba9fd63ba20b51a..0000000000000000000000000000000000000000
--- a/test/mkgrokdump/BUILD.gn
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright 2017 the V8 project authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import("../../gni/v8.gni")
-
-v8_executable("mkgrokdump") {
-  testonly = true
-
-  # mkgrokdump is used to create tools/v8heapconst.py.
-
-  sources = [
-    "mkgrokdump.cc",
-  ]
-
-  configs = [ "../..:internal_config_base" ]
-
-  defines = []
-
-  deps = [
-    "../..:v8",
-    "../..:v8_libbase",
-    "../..:v8_libplatform",
-    "//build/config/sanitizers:deps",
-    "//build/win:default_exe_manifest",
-  ]
-}