DO NOT MERGE: Revert "Add summary text to Display->Brightness level."

This reverts commit 03ee2537016e2df94eaec8a8af1c94a57a3b1199.

The change does not work properly and is causing confusion.

Bug: 36650108

Change-Id: I00acced742b20e215c869ed58eb8750c654f5742
diff --git a/src/com/android/settings/DisplaySettings.java b/src/com/android/settings/DisplaySettings.java
index 1230ae5..de81180 100644
--- a/src/com/android/settings/DisplaySettings.java
+++ b/src/com/android/settings/DisplaySettings.java
@@ -27,7 +27,6 @@
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.display.AutoBrightnessPreferenceController;
 import com.android.settings.display.AutoRotatePreferenceController;
-import com.android.settings.display.BrightnessLevelPreferenceController;
 import com.android.settings.display.CameraGesturePreferenceController;
 import com.android.settings.display.DozePreferenceController;
 import com.android.settings.display.FontSizePreferenceController;
@@ -104,7 +103,6 @@
         controllers.add(new VrDisplayPreferenceController(context));
         controllers.add(new WallpaperPreferenceController(context));
         controllers.add(new ThemePreferenceController(context));
-        controllers.add(new BrightnessLevelPreferenceController(context));
         return controllers;
     }
 
diff --git a/src/com/android/settings/display/BrightnessLevelPreferenceController.java b/src/com/android/settings/display/BrightnessLevelPreferenceController.java
deleted file mode 100644
index e0000d6..0000000
--- a/src/com/android/settings/display/BrightnessLevelPreferenceController.java
+++ /dev/null
@@ -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 static android.provider.Settings.System.SCREEN_BRIGHTNESS;
-
-import android.content.Context;
-import android.provider.Settings;
-import android.support.v7.preference.Preference;
-import com.android.settings.core.PreferenceController;
-import java.text.NumberFormat;
-
-public class BrightnessLevelPreferenceController extends PreferenceController {
-
-    private static final String KEY_BRIGHTNESS = "brightness";
-
-    public BrightnessLevelPreferenceController(Context context) {
-        super(context);
-    }
-
-    @Override
-    public boolean isAvailable() {
-        return true;
-    }
-
-    @Override
-    public String getPreferenceKey() {
-        return KEY_BRIGHTNESS;
-    }
-
-    @Override
-    public void updateState(Preference preference) {
-        final double brightness = Settings.System.getInt(mContext.getContentResolver(),
-            SCREEN_BRIGHTNESS, 0);
-        preference.setSummary(NumberFormat.getPercentInstance().format(brightness / 255));
-    }
-
-}
diff --git a/tests/robotests/src/com/android/settings/display/BrightnessLevelPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/display/BrightnessLevelPreferenceControllerTest.java
deleted file mode 100644
index 025e1ae..0000000
--- a/tests/robotests/src/com/android/settings/display/BrightnessLevelPreferenceControllerTest.java
+++ /dev/null
@@ -1,76 +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 static android.provider.Settings.System.SCREEN_BRIGHTNESS;
-import static com.google.common.truth.Truth.assertThat;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
-import android.content.ContentResolver;
-import android.content.Context;
-import android.provider.Settings;
-import android.support.v7.preference.Preference;
-
-import com.android.settings.SettingsRobolectricTestRunner;
-import com.android.settings.TestConfig;
-import com.android.settings.testutils.shadow.SettingsShadowSystemProperties;
-
-import java.text.NumberFormat;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-import org.robolectric.annotation.Config;
-
-@RunWith(SettingsRobolectricTestRunner.class)
-@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
-public class BrightnessLevelPreferenceControllerTest {
-    @Mock
-    private Context mContext;
-    @Mock
-    private ContentResolver mContentResolver;
-    @Mock
-    private Preference mPreference;
-
-    private BrightnessLevelPreferenceController mController;
-
-    @Before
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
-
-        mController = new BrightnessLevelPreferenceController(mContext);
-    }
-
-    @Test
-    public void isAvailable_shouldAlwaysReturnTrue() {
-        assertThat(mController.isAvailable()).isTrue();
-    }
-
-    @Test
-    public void updateState_shouldSetSummary() {
-        final NumberFormat formatter = NumberFormat.getPercentInstance();
-        when(mContext.getContentResolver()).thenReturn(mContentResolver);
-        Settings.System.putInt(mContentResolver, SCREEN_BRIGHTNESS, 45);
-
-        mController.updateState(mPreference);
-
-        verify(mPreference).setSummary(formatter.format(45.0 / 255));
-    }
-
-}