Move matrix-appservice-discord into a separate role

roles/matrix-synapse/templates/ext/appservice-discord/systemd/matrix-appservice-discord.service.j2

@@ -1,32 +0,0 @@
-#jinja2: lstrip_blocks: "True"
-[Unit]
-Description=Matrix Appservice Discord server
-After=docker.service
-Requires=docker.service
-Requires=matrix-synapse.service
-After=matrix-synapse.service
-
-[Service]
-Type=simple
-ExecStartPre=-/usr/bin/docker kill matrix-appservice-discord
-ExecStartPre=-/usr/bin/docker rm matrix-appservice-discord
-
-ExecStart=/usr/bin/docker run --rm --name matrix-appservice-discord \
-			--log-driver=none \
-			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
-			--cap-drop=ALL \
-			--network={{ matrix_docker_network }} \
-			{% if matrix_appservice_discord_container_expose_client_server_api_port %}
-			-p 127.0.0.1:9005:9005 \
-			{% endif %}
-			-v {{ matrix_appservice_discord_base_path }}:/data \
-			{{ matrix_appservice_discord_docker_image }}
-
-ExecStop=-/usr/bin/docker kill matrix-appservice-discord
-ExecStop=-/usr/bin/docker rm matrix-appservice-discord
-Restart=always
-RestartSec=30
-SyslogIdentifier=matrix-appservice-discord
-
- [Install]
-WantedBy=multi-user.target