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 OK in principle to remove nonsensical content.

The excessive pre-coordination dogma does not have to be invoked here (and should probably be put to rest – the only thing that matters is the right level of pre-coordination, as required by use cases. This is a bit of a personal crusade, but I think it is good to reaffirm once in a while.)

Unclear how this could impact analytics, but probably very little if these concepts are nonsensical to start with.

 As mentioned elsewhere, we fully support retiring these concepts. Although the initial item seems to be to address the mapping issues, a larger task should also be undertaken to remove all similar concepts in both event and finding hierarchies. Sometimes it's not even clear what role the subject of record would have in a concept:
215606001|Submersion or drowning due to being thrown overboard, water skier injured (event)| - is the subject the person who fell overboard and drowned? or the skier (that presumably crashed into the person who fell overboard?)?

216234009|Poisoning caused by carbon monoxide from aircraft while in transit, without accident to aircraft, occupant of spacecraft injured (disorder)|
215722007|Injury in water transport caused by laundry machinery, water skier injured (disorder)|