remove unused resources

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

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

@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Nextcloud Talk application
-  ~
-  ~ @author Mario Danic
-  ~ Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
-  ~
-  ~ This program is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by
-  ~ the Free Software Foundation, either version 3 of the License, or
-  ~ at your option) any later version.
-  ~
-  ~ This program is distributed in the hope that it will be useful,
-  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
-  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  ~ GNU General Public License for more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License
-  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-       android:shape="oval">
-    <solid android:color="#757575" />
-    <stroke
-        android:width="2dp"
-        android:color="@color/white" />
-    <size
-        android:width="32dp"
-        android:height="32dp" />
-</shape>

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

@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Nextcloud Talk application
-  ~
-  ~ @author Mario Danic
-  ~ Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
-  ~
-  ~ This program is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by
-  ~ the Free Software Foundation, either version 3 of the License, or
-  ~ at your option) any later version.
-  ~
-  ~ This program is distributed in the hope that it will be useful,
-  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
-  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  ~ GNU General Public License for more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License
-  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-       android:shape="oval">
-    <solid android:color="@color/colorPrimary" />
-    <stroke
-        android:width="2dp"
-        android:color="@color/white" />
-    <size
-        android:width="32dp"
-        android:height="32dp" />
-</shape>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ /*
-  ~  * Nextcloud Talk application
-  ~  *
-  ~  * @author Mario Danic
-  ~  * Copyright (C) 2017-2020 Mario Danic <mario@lovelyhq.com>
-  ~  *
-  ~  * This program is free software: you can redistribute it and/or modify
-  ~  * it under the terms of the GNU General Public License as published by
-  ~  * the Free Software Foundation, either version 3 of the License, or
-  ~  * at your option) any later version.
-  ~  *
-  ~  * This program is distributed in the hope that it will be useful,
-  ~  * but WITHOUT ANY WARRANTY; without even the implied warranty of
-  ~  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  ~  * GNU General Public License for more details.
-  ~  *
-  ~  * You should have received a copy of the GNU General Public License
-  ~  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  ~  */
-  -->
-
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
-</adaptive-icon>