Remove unused systemd target/service

These might have been intended for some custom downstream use but were never
actually packaged. Seeing as upstream does not approve of these and instead
wishes users to implement their own setup using their Wiki, I think it best to
have the user do just that without downstream fragmentation.

sway-session.target

@@ -1,8 +0,0 @@
-# https://github.com/swaywm/sway/wiki/Systemd-integration
-
-[Unit]
-Description=sway compositor session
-Documentation=man:systemd.special(7)
-BindsTo=graphical-session.target
-Wants=graphical-session-pre.target
-After=graphical-session-pre.target

sway.service

@@ -1,16 +0,0 @@
-# https://github.com/swaywm/sway/wiki/Systemd-integration
-
-[Unit]
-Description=sway - SirCmpwn's Wayland window manager
-Documentation=man:sway(5)
-BindsTo=graphical-session.target
-Wants=graphical-session-pre.target
-After=graphical-session-pre.target
-
-[Service]
-Type=simple
-EnvironmentFile=-%h/.config/sway/env
-ExecStart=/usr/bin/sway
-Restart=on-failure
-RestartSec=1
-TimeoutStopSec=10