Remove [Install] sections fron snapraid one-off services

Timer-activated oneshot services shouldn't be directly startable at boot — the timer handles scheduling.
This won't cause harm but is incorrect systemd practice.

Author: serpro69

metal/roles/storage/templates/snapraid-runner.timer.j2

@@ -6,6 +6,3 @@ Description=Run SnapRAID daily sync
 OnCalendar=*-*-* {{ snapraid_maintenance.sync_time }}:00
 Persistent=true
 RandomizedDelaySec=5m
-
-[Install]
-WantedBy=timers.target

metal/roles/storage/templates/snapraid-scrub.service.j2

@@ -10,6 +10,3 @@ User=root
 Group=root
 StandardOutput=append:/var/log/snapraid/snapraid-scrub.log
 StandardError=append:/var/log/snapraid/snapraid-scrub.log
-
-[Install]
-WantedBy=multi-user.target