lineage-sdk: Retire HostnamePreference as net.hostname no longer works

Change-Id: Ibecaccd5f853570fb4e02cba7274429f2bb037b2

sdk/src/java/org/lineageos/internal/preference/deviceinfo/HostnamePreference.java

@@ -1,74 +0,0 @@
-/*
- * Copyright (C) 2013 The CyanogenMod project
- * Copyright (C) 2018 The LineageOS 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 org.lineageos.internal.preference;
-
-import android.content.Context;
-import android.os.SystemProperties;
-import android.text.TextUtils;
-import android.util.AttributeSet;
-import android.util.Log;
-
-import androidx.preference.EditTextPreference;
-
-import lineageos.providers.LineageSettings;
-
-public class HostnamePreference extends EditTextPreference {
-
-    private static final String TAG = "HostnamePreference";
-
-    private static final String PROP_HOSTNAME = "net.hostname";
-
-    public HostnamePreference(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        setSummary(getText());
-    }
-
-    @Override
-    public void setText(String text) {
-        if (text == null) {
-            Log.e(TAG, "tried to set null hostname, request ignored");
-            return;
-        }
-        // Remove any character that is not alphanumeric, period, or hyphen
-        text = text.replaceAll("[^-.a-zA-Z0-9]", "");
-        if (TextUtils.isEmpty(text)) {
-            Log.w(TAG, "setting empty hostname");
-        } else {
-            Log.i(TAG, "hostname has been set: " + text);
-        }
-        SystemProperties.set(PROP_HOSTNAME, text);
-        persistHostname(text);
-        setSummary(text);
-    }
-
-    @Override
-    public String getText() {
-        return SystemProperties.get(PROP_HOSTNAME);
-    }
-
-    @Override
-    public void onSetInitialValue(boolean restoreValue, Object defaultValue) {
-        persistHostname(getText());
-    }
-
-    public void persistHostname(String hostname) {
-        LineageSettings.Secure.putString(getContext().getContentResolver(),
-                LineageSettings.Secure.DEVICE_HOSTNAME, hostname);
-    }
-
-}