There is no official way to do this. But if you want to do this and still keep migration history intact. You can run your revert logic directly on database and remove row for that particular migration file from "migrations" table. If you don't want to run migration from that file again, you can delete it (else it will again run in next migration).
As others mentioned, this should be done only if subsequent migration steps were independent of the one you are removing. And yes, this does not answer the question, because this is not "typeorm" way but a hack, but could help somebody.