In this answer, I pointed out how Kiritsugu planned to use dynamite and the ley-lines to stop the Holy Grail War from occurring again. However, the plan failed because there was an excess amount of Prana in the Grail which caused the next Holy Grail War to occur earlier.
Given that regardless of the ending, the Greater Grail would be stopped (either by the events of Heaven's Feel, or Lord El-Melloi II and Rin dismantling it 10 years later), what happened to Kiritsugu's explosives?
All Wikia says is
The premature occurrence of the Fifth Holy Grail War and the subsequent destruction of the ritual means that it no longer has a purpose.
Yet it also said
The process involved utilizing stocked dynamite and the manipulation of ley-lines to ensure a severe localized earthquake in the targeted area within thirty to forty years of the Fourth War
I'm not sure how big the localized earthquake would be, but since the targeted area would be where the Greater Grail is, and it is under Mount Enzou which according to the Wikia is where Ryuudou Temple is and doesn't look all that far from the school according to a Fate/Hollow Ataraxia map
So did anyone find and remove Kiritsugu's explosives? If not, do we know if they pose a threat to Fuyuki?