chore: 移除systemd定时器相关的安装和文件

删除了spark-update-notifier.timer文件，同时移除Makefile中对应systemd目录的安装拷贝步骤

Makefile

@@ -48,6 +48,5 @@ install:
 	cp -rv pkg/usr/share/bash-completion/ $(DESTDIR)/usr/share/
 	cp -rv pkg/etc/apt/ $(DESTDIR)/etc/
 	cp -rv pkg/tmp/spark-store-install/ $(DESTDIR)/tmp/
-	cp -rv pkg/lib/systemd/ $(DESTDIR)/lib/
 	cp -rv tool/spark-store.asc $(DESTDIR)/opt/durapps/spark-store/bin/
 	ln -s ../../../spark-store/extras/spark-store $(DESTDIR)/opt/durapps/spark-store/bin/spark-store

pkg/lib/systemd/system/spark-update-notifier.timer

@@ -1,11 +0,0 @@
-[Unit]  
-Description=Timer for Spark Update Notifier  
-
-[Timer]  
-# 开机后第一次执行  
-OnBootSec=1min  
-# 每天执行一次  
-OnUnitActiveSec=1d  
-
-[Install]  
-WantedBy=timers.target