Is this what you want? If so, the trick is that most bibliography styles use grid. See How to manually correct the format of bibliography (for ~60% styles)? - #2 by Y.D.X for details.
#show bibliography: it => {
show grid.cell.where(x: 0): none
it
}
#bibliography("ref.bib")
However, I still don’t understand why you want this. After deleting the numbers, how do you cite the work in the main text?
