Delete activity_countdown_timer.xml

activity_countdown_timer.xml

-<?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".CountdownTimer">
-
-
-    <TextView
-         android:id="@+id/countdown_text"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textSize="50sp"
-        tools:text="96:00:00"
-        android:layout_centerVertical="true"
-        android:layout_centerHorizontal="true"/>
-
-    <Button
-        android:id="@+id/countdown_button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Start"
-        android:layout_below="@id/countdown_text"
-        android:layout_centerHorizontal="true"/>
-
-    <Button
-        android:id="@+id/buttonFeedback"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_alignParentTop="true"
-        android:layout_marginTop="526dp"
-        android:text="Feedback"
-        android:onClick="Feedback"/>
-</RelativeLayout>
\ No newline at end of file