Remove the unused cc dummy_toolchain.

PiperOrigin-RevId: 242450527
diff --git a/tools/cpp/cc_configure.bzl b/tools/cpp/cc_configure.bzl
index 9d30b42..b4ffa0f 100644
--- a/tools/cpp/cc_configure.bzl
+++ b/tools/cpp/cc_configure.bzl
@@ -26,14 +26,8 @@
     paths = resolve_labels(repository_ctx, [
         "@bazel_tools//tools/cpp:BUILD.static.freebsd",
         "@bazel_tools//tools/cpp:cc_toolchain_config.bzl",
-        "@bazel_tools//tools/cpp:dummy_toolchain.bzl",
     ])
 
-    repository_ctx.symlink(
-        paths["@bazel_tools//tools/cpp:dummy_toolchain.bzl"],
-        "dummy_toolchain.bzl",
-    )
-
     env = repository_ctx.os.environ
     cpu_value = get_cpu_value(repository_ctx)
     if "BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN" in env and env["BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN"] == "1":
diff --git a/tools/cpp/dummy_toolchain.bzl b/tools/cpp/dummy_toolchain.bzl
deleted file mode 100644
index 45c0285..0000000
--- a/tools/cpp/dummy_toolchain.bzl
+++ /dev/null
@@ -1,23 +0,0 @@
-# pylint: disable=g-bad-file-header
-# Copyright 2017 The Bazel Authors. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Skylark rule that stubs a toolchain."""
-
-def _dummy_toolchain_impl(ctx):
-    ctx = ctx  # unused argument
-    toolchain = platform_common.ToolchainInfo()
-    return [toolchain]
-
-dummy_toolchain = rule(_dummy_toolchain_impl, attrs = {})