remove stale objprofile (#54991)
As mentioned in https://github.com/JuliaLang/julia/issues/54968,
`OBJPROFILE` exposes a functionality which is quite similar to what the
heap snapshot does, but has a considerably worse visualization tool
(i.e. raw printf's compared to the snapshot viewer from Chrome).
Closes https://github.com/JuliaLang/julia/issues/54968.
