android: Remove citra date time picker

src/android/app/src/main/res/layout/sysclock_datetime_picker.xml

@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:padding="8dp"
-    android:gravity="center">
-
-    <DatePicker
-        android:id="@+id/date_picker"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:calendarViewShown="false"
-        android:datePickerMode="spinner"
-        android:spinnersShown="true" />
-
-    <TimePicker
-        android:id="@+id/time_picker"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:timePickerMode="spinner" />
-</LinearLayout>