OmniLib: remove unused resource strings

Change-Id: I87fa94eff54cb7be3acf5fba77294c58cbca5678
diff --git a/res/layout/preference_font_picker.xml b/res/layout/preference_font_picker.xml
deleted file mode 100644
index fd34b75..0000000
--- a/res/layout/preference_font_picker.xml
+++ /dev/null
@@ -1,85 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--  Copyright (C) 2016 The OmniROM Project
-
-  This program is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 2 of the License, or
-  (at your option) any later version.
-
-  This program is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- -->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:minHeight="?android:attr/listPreferredItemHeight"
-    android:gravity="center_vertical"
-    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
-    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
-    android:background="?android:attr/selectableItemBackground"
-    android:clipToPadding="false" >
-
-    <LinearLayout
-        android:id="@+id/icon_frame"
-        style="@style/preference_icon_frame"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:gravity="start|center_vertical"
-        android:orientation="horizontal"
-        android:clipToPadding="false"
-        android:paddingEnd="12dp"
-        android:paddingTop="4dp"
-        android:paddingBottom="4dp">
-        <com.android.internal.widget.PreferenceImageView
-            android:id="@android:id/icon"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:maxWidth="48dp"
-            android:maxHeight="48dp" />
-    </LinearLayout>
-
-    <RelativeLayout
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_weight="1"
-        android:paddingTop="16dp"
-        android:paddingBottom="16dp">
-
-        <TextView android:id="@android:id/title"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:singleLine="true"
-            android:textAppearance="?android:attr/textAppearanceListItem"
-            android:ellipsize="marquee"
-            android:fadingEdge="horizontal" />
-
-        <TextView android:id="@android:id/summary"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_below="@android:id/title"
-            android:layout_alignStart="@android:id/title"
-            android:textAppearance="?android:attr/textAppearanceListItemSecondary"
-            android:textColor="?android:attr/textColorSecondary"
-            android:maxLines="1" />
-    </RelativeLayout>
-
-    <LinearLayout
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="8dp">
-
-        <TextView android:id="@+id/font_sample"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:singleLine="true"
-            android:textAppearance="?android:attr/textAppearanceMedium"
-            android:layout_gravity="center"
-            android:text="@string/font_sample_text" />
-    </LinearLayout>
-</LinearLayout>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 0034955..935dc51 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -18,10 +18,7 @@
  -->
 
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="font_sample_text">11:57</string>
-    <string name="ok">OK</string>
     <string name="action_save">Save</string>
-    <string name="cancel">Cancel</string>
     <string name="disabled_entry">Disabled</string>
     <string name="profile_choose_app">Choose app</string>
     <string name="not_ready_summary">Resolving...</string>
diff --git a/src/org/omnirom/omnilib/preference/ColorSelectPreference.java b/src/org/omnirom/omnilib/preference/ColorSelectPreference.java
index 8155e82..459732c 100644
--- a/src/org/omnirom/omnilib/preference/ColorSelectPreference.java
+++ b/src/org/omnirom/omnilib/preference/ColorSelectPreference.java
@@ -135,7 +135,7 @@
         final ColorSelectDialog d = new ColorSelectDialog(getContext(),
                 0xFF000000 | mColorValue, mShowMultiColor, mShowLedPreview, mWithAlpha);
 
-        d.setButton(AlertDialog.BUTTON_POSITIVE, mResources.getString(R.string.ok),
+        d.setButton(AlertDialog.BUTTON_POSITIVE, mResources.getString(android.R.string.ok),
                 new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {
@@ -149,7 +149,7 @@
                 callChangeListener(new Integer(mColorValue));
             }
         });
-        d.setButton(AlertDialog.BUTTON_NEGATIVE, mResources.getString(R.string.cancel),
+        d.setButton(AlertDialog.BUTTON_NEGATIVE, mResources.getString(android.R.string.cancel),
                 new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {