dispensing with the preliminaries; without further ado
A formal, somewhat old-fashioned opening phrase used at the start of a brief letter to skip lengthy seasonal greetings or polite preliminaries. Mainly seen in traditional correspondence.
Without further ado, thank you very much for your help the other day.
From 略 (abbreviation, omission) and 啓 (to open, to state). The phrase literally means 'abbreviated opening', indicating that the writer is omitting the usual formal opening remarks.