Revert "[Thread] add Android.bp for Thread flags"

This reverts commit a59a6e30.

Reason for revert: this should not be added in the mainline module but in platform

Merged-In: I88c993680976d2e10d672bfdbf45119f2db13868
Change-Id: I680f23b5f8099b1ea4a316b768a56f1be5c78862

thread/flags/Android.bp

-//
-// Copyright (C) 2024 The Android Open Source Project
-//
-// 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.
-//
-
-package {
-    default_applicable_licenses: ["Android-Apache-2.0"],
-}
-
-aconfig_declarations {
-    name: "thread_aconfig_flags",
-    package: "com.android.net.thread.flags",
-    srcs: ["thread_base.aconfig"],
-}
-
-java_aconfig_library {
-    name: "thread_aconfig_flags_lib",
-    aconfig_declarations: "thread_aconfig_flags",
-    min_sdk_version: "30",
-    apex_available: [
-        "//apex_available:platform",
-        "com.android.tethering",
-    ],
-}