[Bug libstdc++/102048] __gnu_cxx::rope.erase(size_t __p) implementation seems to be wrong

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102048

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That function was not part of the SGI rope so I think we should just remove it:
https://www.boost.org/sgi/stl/Rope.html