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

[fstqwq at foxmail dot com via Gcc-bugs]

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

--- Comment #5 from Zonghan Yang <fstqwq at foxmail dot com> ---
I do agree this function should be deleted if SGI rope doesn't contain it.
Also, it's the easiest way to fix the problem.