Hah! On a lark, I tried to trash the unwanted apps in a volume into which I wasn't booted, and I was successful with only verification required.
Mission accomplished, and I wasn't even asked to verify. (I"ll now have to boot into another volume to trash any updates to the trashed apps included in forthcoming macOS updates.)
Shades of OS 9!
More: And in a slightly different vein, this time around, macOS has allowed me get rid of my Spotlight icon.