Restart the shell unconditionally after every update

Updates routinely replace the shell's QML, and a stale process can
lazy-load new files into old code. Restarting at the end of every
omarchy update removes the need for migrations to restart the shell
or defer one with the restart-shell-required marker: the login-time
migration path already runs a fresh shell that hot-reloads shell.json.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

migrations/1785344985.sh

@@ -45,5 +45,3 @@ if [[ -s $config_file ]] && omarchy-cmd-present jq; then
     end
   ' "$config_file" >"$tmp" && mv "$tmp" "$config_file" || rm -f "$tmp"
 fi
-
-omarchy-restart-shell