Having an item clear something like Kelvin's Ice dome would be incredibly strong. His entire kit falls apart if you can just remove it. Other heroes have items that work as counters to their skills, even their ults, but nothing anywhere near as strong as just straight up removing the ability.
This wouldn't be a good item if it were to remove player generated obstacles. I could one that grants immunity to player generated obstacles for a duration (say 5-6 seconds) but not outright removing them.