Removed move transformation for exoplayer2 audio package-info.java

https://github.com/google/ExoPlayer/commit/dda17db261758f7211ffa793ee9cc6fea842addb creation of audio/package-info.java introduced a copybara conflict with the exoplayer2/audio/package-info.java move transformation in copy.bara.sky. Solution was to remove original package-info-common-audio.java and the move transformation as https://github.com/google/ExoPlayer/commit/dda17db261758f7211ffa793ee9cc6fea842addb now covers it.

Tested with a copybara push to exoplayer github

PiperOrigin-RevId: 485329674

google3/third_party/java_src/android_libs/media/github/package-info-common-audio.java

-/*
- * Copyright (C) 2019 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.
- */
-@NonNullApi
-package com.google.android.exoplayer2.audio;
-
-import com.google.android.exoplayer2.util.NonNullApi;