Bug#1073400: close this bug? Re: gtk-doc FTBFS

[Rebecca N. Palmer]

gtk-doc also FTBFS in reproducible-builds from approximately 2024-05-30 
to 2024-09-24 in unstable (but not in trixie, meaning the bug was in 
something other than gtk-doc) but now builds successfully:
https://tests.reproducible-builds.org/debian/history/gtk-doc.html
The logs aren't kept, so there's no proof that this was specifically 
this bug, but it seems likely.

Hence, I suggest closing this bug.