Revert "Add settings for scheduling dark theme"

This reverts commit 7141b142df.

Reason for revert: This is breaking builds on git_qt-qpr1-dev

Change-Id: I7766826d3fc86a12fc8411b027a52eceb5a66019

src/com/android/settings/display/darkmode/DarkModeSettingsFragment.java

@@ -1,81 +0,0 @@
-/*
- * 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.
- */
-
-package com.android.settings.display.darkmode;
-
-import android.content.Context;
-import android.os.Bundle;
-import android.app.settings.SettingsEnums;
-import com.android.settings.R;
-import com.android.settings.dashboard.DashboardFragment;
-import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settingslib.search.SearchIndexable;
-
-/**
- * Settings screen for Dark UI Mode
- */
-@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
-public class DarkModeSettingsFragment extends DashboardFragment {
-
-    private static final String TAG = "DarkModeSettingsFragment";
-    private DarkModeObserver mContentObserver;
-    private Runnable mCallback = () -> {
-        updatePreferenceStates();
-    };
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        final Context context = getContext();
-        mContentObserver = new DarkModeObserver(context);
-    }
-
-    @Override
-    public void onStart() {
-        super.onStart();
-        // Listen for changes only while visible.
-        mContentObserver.subscribe(mCallback);
-    }
-
-    @Override
-    public void onStop() {
-        super.onStop();
-        // Stop listening for state changes.
-        mContentObserver.unsubscribe();
-    }
-
-    @Override
-    protected int getPreferenceScreenResId() {
-        return R.xml.dark_mode_settings;
-    }
-
-    @Override
-    public int getHelpResource() {
-        return R.string.help_url_dark_theme;
-    }
-
-    @Override
-    protected String getLogTag() {
-        return TAG;
-    }
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.DARK_UI_SETTINGS;
-    }
-
-    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.dark_mode_settings);
-}