lists/kmod-{omnia,mox}: remove droped kmod-letrig-* packages
The reason for this change is that pkgupdate in HBD ends with the error inconsistent: Requested package kmod-ledtrig-default-on that is not available.
Removes:
- kmod-ledtrig-default-on
- kmod-ledtrig-heartbeat
- kmod-ledtrig-netdev
- kmod-ledtrig-timer
Based on upstream change https://github.com/openwrt/openwrt/commit/583e39e3d5149357c8070eb7cdd942e42ea44906