Remove unused xml

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/res/drawable/ic_expand_less.xml

@@ -1,15 +0,0 @@
-<!--
-  ~ Nextcloud - Android Client
-  ~
-  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
-  ~ SPDX-License-Identifier: Apache-2.0
--->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="960"
-    android:viewportHeight="960">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="m296,615 l-56,-56 240,-240 240,240 -56,56 -184,-184 -184,184Z" />
-</vector>