fix the io failure for hotplug-in device

[Mrpaoo]

related issue #4901. When remove the device that need power-management, Waybar would crash due to uncatch exception

[Mrpaoo]

fix the io failure problem mentioned at #4901. For hot-plugin device, it is inevitable to face io failure especially when you create a ifstream obj and using operator >> to access it while you remove your device, and this is the time when crash happen.
Here operator>> may throw an exception and outer try-catch blk cant catch it. So just catch it and do nothing

[Alexays]

Thanks!