Revert "Listen to brigtness updates to update brightness summary."

This reverts commit 83e2741bd7.

Change-Id: I93e2cf00ac5ffce7bd4e5951dcbe19c4189ffafd

src/com/android/settings/display/PowerManagerWrapper.java

@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2017 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 com.android.settings.display;
-
-import android.os.PowerManager;
-
-/**
- * This class replicates a subset of the android.os.PowerManager. The class exists so that we can
- * use a thin wrapper around the PowerManager in production code and a mock in tests. We cannot
- * directly mock or shadow the PowerManager, because some of the methods we rely on are newer than
- * the API version supported by Robolectric or are hidden.
- */
-public class PowerManagerWrapper {
-    private final PowerManager mPowerManager;
-
-    public PowerManagerWrapper(PowerManager powerManager) {
-        mPowerManager = powerManager;
-    }
-
-    public int getMinimumScreenBrightnessSetting() {
-        return mPowerManager.getMinimumScreenBrightnessSetting();
-    }
-
-    public int getMaximumScreenBrightnessSetting() {
-        return mPowerManager.getMaximumScreenBrightnessSetting();
-    }
-
-    public int getMinimumScreenBrightnessForVrSetting() {
-        return mPowerManager.getMinimumScreenBrightnessForVrSetting();
-    }
-
-    public int getMaximumScreenBrightnessForVrSetting() {
-        return mPowerManager.getMaximumScreenBrightnessForVrSetting();
-    }
-}