clean:del ucitrack config if uninstall

Makefile

@@ -51,7 +51,7 @@ define Package/luci-app-adguardhome/postinst
 #!/bin/sh
 	/etc/init.d/AdGuardHome enable >/dev/null 2>&1
 	enable=$(uci get AdGuardHome.AdGuardHome.enabled 2>/dev/null)
-	if [ "$enable"x == "1"x ]; then
+	if [ "$enable" == "1" ]; then
 		/etc/init.d/AdGuardHome reload
 	fi
 	rm -f /tmp/luci-indexcache
@@ -64,6 +64,10 @@ define Package/luci-app-adguardhome/prerm
 if [ -z "$${IPKG_INSTROOT}" ]; then
      /etc/init.d/AdGuardHome disable
      /etc/init.d/AdGuardHome stop
+uci -q batch <<-EOF >/dev/null 2>&1
+	delete ucitrack.@AdGuardHome[-1]
+	commit ucitrack
+EOF
 fi
 exit 0
 endef