Removing Address From Symbol With Several Addresses

Greetings all,
[PR breakpoints/20133](https://sourceware.org/bugzilla/show_bug.cgi?id=20133)
has a symbol with multiple addresses and the reporter tries to remove one of
those from the symbol. gdb cannot remove such a "sub-breakpoint," though, and
spits out a warning.

Wouldn't it be handy to have something to remove one instance of a duplicated
symbol? Are there special technical constraints? Or has that already been
implemented?

Cordian