Clean up imports

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/controllers/ChatController.java

@@ -51,7 +51,6 @@ import android.widget.TextView;
 import com.amulyakhare.textdrawable.TextDrawable;
 import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
-import com.bluelinelabs.conductor.changehandler.VerticalChangeHandler;
 import com.bumptech.glide.load.DataSource;
 import com.bumptech.glide.load.engine.DiskCacheStrategy;
 import com.bumptech.glide.load.engine.GlideException;

app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java

@@ -22,7 +22,6 @@ package com.nextcloud.talk.controllers;
 
 import android.app.SearchManager;
 import android.content.Context;
-import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;