Remove xenial file leftover

.github/scripts/install-xenial.sh

@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-
-# Adding repos and packages
-add-apt-repository -y ppa:libretime/libretime
-apt-get -q update
-apt-get install -y gstreamer1.0-plugins-base \
-  gstreamer1.0-plugins-good \
-  gstreamer1.0-plugins-bad \
-  gstreamer1.0-plugins-ugly \
-  libgirepository1.0-dev \
-  liquidsoap \
-  liquidsoap-plugin-faad \
-  liquidsoap-plugin-lame \
-  liquidsoap-plugin-mad \
-  liquidsoap-plugin-vorbis \
-  python3-gst-1.0 \
-  silan \
-  gcc \
-  gir1.2-gtk-3.0 \
-  python3-setuptools \
-  python3-gi \
-  python3-gi-cairo \
-  python-cairo \
-  pkg-config \
-  libcairo2-dev
-
-# Making log directory for PHP tests
-mkdir -p "$LIBRETIME_LOG_DIR"
-chown runner:runner "$LIBRETIME_LOG_DIR"