Remove unused V8 integration code in Sky

sky/engine/bindings/scripts/BUILD.gn

-# Copyright 2014 The Chromium 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("//sky/engine/bindings/bindings.gni")
-import("//sky/engine/bindings/scripts/scripts.gni")
-import("//sky/engine/bindings/templates/templates.gni")
-
-visibility = [ "//sky/*" ]
-
-# This separate pre-caching step is required to use lex/parse table
-# caching in PLY, since PLY itself does not check if the cache is
-# valid, and thus may end up using a stale cache if this step hasn't
-# been run to update it.
-#
-# This action's dependencies *is* the cache validation.
-#
-# GYP version: scripts.gyp:cached_lex_yacc_tables
-action("cached_lex_yacc_tables") {
-  script = "blink_idl_parser.py"
-
-  inputs = idl_lexer_parser_files
-  outputs = [
-    "$bindings_scripts_output_dir/lextab.py",
-    "$bindings_scripts_output_dir/parsetab.pickle",
-  ]
-
-  args = [ rebase_path(bindings_scripts_output_dir, root_build_dir) ]
-}
-
-# A separate pre-caching step is *required* to use bytecode caching in
-# Jinja (which improves speed significantly), as the bytecode cache is
-# not concurrency-safe on write; details in code_generator_v8.py.
-#
-# GYP version: scripts.gyp:cached_jinja_templates
-action("cached_jinja_templates") {
-  script = "code_generator_v8.py"
-
-  inputs = jinja_module_files + [ "code_generator_v8.py" ] +
-           code_generator_template_files
-
-  # Dummy file to track dependency.
-  stamp_file = "$bindings_scripts_output_dir/cached_jinja_templates.stamp"
-  outputs = [
-    stamp_file,
-  ]
-
-  args = [
-    rebase_path(bindings_scripts_output_dir, root_build_dir),
-    rebase_path(stamp_file, root_build_dir),
-  ]
-}