Glider closing with B button from Mario Kart 7 is present in Mario Kart 8/Deluxe but it is not possible to perform because the game clears the B button input when in a glider. Since it is only referred to in that file, players can assume that they cut it really early in development.
In the file RaceLogData.exbin, appears the text 'Tail' as well as all other known cut items. In the file RaceLogData.exbin, appears the text 'FakeBox' as well as all other known cut items. It could just be a leftover for testing the Crazy 8 during development and they forgot to change the name. In the Item Slot Table file aml, there is an item called Seven. Most likely, these items are holdovers (and serve the same lack of purpose) as the same-name items in Mario Kart 7. In the item slot table file aml, there are two test items called Test3 and Test4.