Remove abandoned implementation.

To prevent accidental ressurection via manifest errors.

Change-Id: I269dc248c2cb5e4bfdcb38334962070f1aba339e

res/drawable/audio_progress_bar_progress.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-    Copyright (C) 2015 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.
--->
-<shape xmlns:android="http://schemas.android.com/apk/res/android">
-    <solid android:color="@color/audio_progress_bar_color" />
-    <corners android:radius="3dp" />
-</shape>