Delete dialog_room.xml

app/src/main/res/layout/dialog_room.xml

-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:minWidth="300dp"
-    android:orientation="vertical">
-
-    <ImageButton
-        android:id="@+id/button_close"
-        android:layout_width="32dp"
-        android:layout_height="32dp"
-        android:scaleType="fitXY"
-        android:layout_marginTop="5dp"
-        android:layout_marginBottom="@dimen/margin_16"
-        android:layout_marginRight="5dp"
-        android:layout_marginEnd="5dp"
-        android:layout_gravity="end"
-        app:srcCompat="@drawable/ic_close_circle_outline_black_24dp"
-        android:tint="@color/color_accent"
-        android:background="?attr/selectableItemBackgroundBorderless" />
-
-    <TextView
-        android:id="@+id/text_message"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="@dimen/margin_16"
-        android:layout_gravity="center"
-        android:gravity="center"
-        android:visibility="gone" />
-
-    <android.support.v7.widget.RecyclerView
-        android:id="@+id/recycler_view"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:scrollbars="vertical" />
-</LinearLayout>
\ No newline at end of file